Alexander Donski (; born 1 August 1998) is a professional tennis player competing on the ATP Challenger Tour and the ITF Tour.
Donski holds the second highest-ever ATP doubles ranking by a Bulgarian, achieving a career-high of world No. 142 on 21 July 2025. Only Grigor Dimitrov has achieved a higher ATP doubles ranking for a Bulgarian player, reaching No. 66.
Donski has won 19 ITF Men's World Tennis Tour titles in doubles and is a member of the Bulgarian Davis Cup Team.
The channel was made in close collaboration with his cousin, Lazar Dokov, who traveled with and competed alongside him in Southeast Europe until October 2017.
As of January 2025, the channel has 40 videos, over 6,000 subscribers, and more than 800,000 views in total.
The highlights of his activity in singles on the ITF Junior Tour include the following:
In doubles he won three titles including a Grade 1 event in Morocco, a Grade 4 event in the United States, a Grade 5 event in the Bahamas, and made one further final at a Grade 4 event in Greece.
Overall, in international junior competition, Donski compiled a cumulative win/loss record of 68-47 in singles and 33-40 in doubles. Donski represented Canada in international competition until June 2016, after which he began representing Bulgaria, citing heritage and favorable player development opportunities.
Some of the more notable opposition he faced in 2017 who barred him from acquiring additional ATP points included Hubert Hurkacz, Botic van de Zandschulp, and Tallon Griekspoor.
Most of his first season as a professional player was well documented on his YouTube channel.
In 2018, Donski only saw limited progress on the singles front. Despite competing in the main draw of Futures events another 6 times, he accumulated only 3 ATP points that year. He was unable to advance further than the second round of the main draw of any given singles event. In doubles, he fared better and reached his first final partnering Vasil Kirkov in Sozopol and made two other semifinal runs. He finished the year ranked No. 1431 in singles and No.1061 in doubles.
In doubles, Donski reached five finals and converted on two occasions. He won his first title at an M15 in Telavi and then another in Pretoria later in the year, where he also won his first singles title. These strong showings in both singles and doubles afforded him the year-end ATP rankings of No.585 and No.429 respectively.
In singles, out of a truncated schedule of just 10 events that year, including a Davis Cup match in Costa Rica, Donski won only 3 matches in total and never managed to pass the second round at any event. The most competitive singles match he played that year came in November at the second round of an M15 event in Antalya, where he clashed with recent ITF Junior No.1, Holger Rune. Rune defeated Donski 5-7, 6-3, 6-3.
In doubles, Donski also found little success, making just a single semifinal appearance in October at an M15 event in Sharm El Sheikh.
Despite these setbacks, his year-end ATP ranking for singles did not change substantially (ended No.596), as two temporary special provisions across the tour were in place at the time. One was a freeze of ATP points won in 2019 to account for disruptions in the regular event calendar by the pandemic, while the other was related to ongoing experimental structural changes in the ranking system by the ITF. Donski's year-end doubles ranking, however, did drop by more than 240 spots to No.671 because of the timing of the acquisition of previous points.
In late September 2021, Donski scored his first singles win at the ATP level at the 2021 Sofia Open, where he received another wild card for the singles qualifying draw. He pulled an upset win over eighth seed Jurij Rodionov 2-6, 6-1, 7-6(4) before losing in the final round to the Italian veteran, Andreas Seppi. He also played in the doubles competition at his home ATP tournament with Dimitar Kuzmanov, but the Bulgarian duo lost in a third set tiebreaker to eventual champions Jonny O'Mara and Ken Skupski. Cumulatively, however, these results could not prevent his singles ranking from dipping to ATP No. 659 by end of the year.
The Bulgarian fared better on the doubles scene and resumed building up his ranking during the 2021 season. Donski seized three more ITF titles, securing a victory at the M15 event in Sozopol with Billy Harris and following it up with triumphs at the M25 events in Saint-Dizier and Villers-lès-Nancy with Petros Tsitsipas. He also made it to the final of an M25 event in Říčany partnering Colin Sinclair, but the pair came up short. Donski finished the year ranked No. 505 in doubles.
Despite Donski’s surging form in singles in the beginning of the year, this momentum would not carry through the spring or the summer. It was not until October 2022 when he would once again string together multiple consecutive matches. He reached a further three semifinals in the M15 category (twice in Sozopol and once in Monastir) before the year’s end. Ultimately, 2022 was actually a rather stagnant year in terms of singles rankings progress for Donski. His results only allowed him to improve his ranking to ATP No.628, only 31 spots higher than the year before.
In contrast to his performance in singles, Donski continued to push the front in doubles and reached new heights. In 2022, Donski reached six finals and, of those finals, captured four titles (three M15 events, one M25). Interestingly enough, Donski accomplished this with six different partners (Théo Arribagé, Zvonimir Babić, David Pichler, Karl Friberg, Vladyslav Orlov, and Tim Sandkaulen) reinforcing his claim as a highly adaptable player in the game of doubles.
This versatility also manifested itself in a strong 6-3, 7-6(6) victory over the South African team of Raven Klaasen (former ATP no.7 in doubles) and Lleyton Cronje Davis Cup competition in September back in Bulgaria. In addition, Donski made good use of another wildcard at the ATP 250 event in Sofia by defeating the team of Fabrice Martin and Aisam Qureshi (a former top 10 doubles player) 4-6, 6-3, 10-8 alongside his countryman, Alexandar Lazarov. Donski and Lazarov were defeated in the next round by the top seeded team of Simone Bolelli and Fabio Fognini.
This success catapulted him to a then career-high ATP doubles ranking of No.248, which he achieved in October 2022. His final year-end ranking, however, was slightly lower at No.259.
He also made four other finals at M15 events (Antalya, Štore, Celje, Monastir), and regularly penetrated as deep as the semifinals of many of the other tournaments that he played in.
The 2023 season, however, was not a successful one in singles for Donski. Out of a mix of 23 tournaments, including 3 ATP Challenger events and another wildcard at the ATP 250 event in Sofia, he only made it to the semifinals of one Futures event, an M15 event in Monastir in late October. Most of his other defeats came either in qualifying rounds or the early rounds of main draws.
Donski ended the year ranked ATP No. 935 in singles and No. 315 in doubles.
Of the nine doubles finals that Donski reached in 2024, six of them (four M25s, an M15, and the Challenger 50) came in partnership with the Portuguese player, Tiago Pereira. This success propelled Donski to a career-high ATP doubles ranking of No. 217 on the 26 August 2025, the third highest-ever doubles ranking a Bulgarian player has ever achieved.
In singles, despite obstacles posed by his lower ranking earlier in the year, Donski found some surprising success at three consecutive ATP Challenger 50 events that took place over the summer. In both Open de Pozoblanco and Dobrich Challenger, Donski passed the qualifying draw and made it to the second round of the main draw. In Pozoblanco, he handily defeated Ulises Blanch in the first round before narrowly falling to second seed and former top 100 player, Egor Gerasimov, 6-4, 3-6, 4-6 after having led 3-0 with a double break in the final set. In the third Challenger 50 event that he played (a second tournament in Dobrich), he received a wildcard into the main draw that he made good use of by reaching the quarterfinals.
Donski finished 2024 with a year-end ATP singles ranking of No. 746.
Following his maiden title at the 2025 Rwanda Challenger II, where he partnered India’s Siddhant Banthia, Donski reached the top 200 in doubles on 17 March 2025.
Year | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Singles | 1575 | 1433 | 568 | 593 | 676 | 605 | 990 | 734 |
Doubles | ||||||||
1046 | 436 | 661 | 517 | 251 | 313 | 221 |
{class=wikitable !Legend (singles) |
ATP Challenger Tour (0–0) |
ITF World Tennis Tour (3–4) |
Hard (3–3) |
Clay (0–1) |
Loss | 0–1 | M15 Sozopol, Bulgaria | World Tennis Tour | Hard | Altuğ Çelikbilek | 7–6(7–5), 3–6, 2–6 | |
Loss | 0–2 | M15 Telavi, Georgia | World Tennis Tour | Clay | Yan Bondarevskiy | 4–6, 0–6 | |
Loss | 0–3 | M15 Johannesburg, South Africa | World Tennis Tour | Hard | Benjamin Lock | 7–6(7–5), 3–6, 6–7(3–7) | |
Win | 1–3 | M15 Pretoria, South Africa | World Tennis Tour | Hard | Arthur Cazaux | 7–6(7–3), 6–7(5–7), 7–6 (8–6) | |
Loss | 1–4 | M15 Monastir, Tunisia | World Tennis Tour | Hard | Laurent Lokoli | 0–6, 6–3, 5–7 | |
Win | 2–4 | M15 Monastir, Tunisia | World Tennis Tour | Hard | Térence Atmane | 6–2, 5–7, 6–3 | |
Win | 3–4 | M15 Pretoria, South Africa | World Tennis Tour | Hard | Cem İlkel | 7–6(7–5), 6–4 |
{class=wikitable style=font-size:97% !Legend (doubles) |
ATP Challenger Tour (1–3) |
ITF Futures/World Tennis Tour (20–14) |
Hard (16–10) |
Clay (5–7) |
Loss | 0–1 | Bulgaria F1, Sozopol | Futures | Hard | Vasil Kirkov | Sébastien Boltz Caio Silva | 5–7, 3–6 | |
Loss | 0–2 | M15 Sozopol, Bulgaria | World Tennis Tour | Hard | Alexandar Lazarov | Alec Adamson Vasil Kirkov | 6–4, 2–6, 6–10 | |
Loss | 0–3 | M15 Plovdiv, Bulgaria | World Tennis Tour | Clay | Simon Anthony Ivanov | Alexander Igoshin Evgenii Tiurnev | 1–6, 7–6(11–9), 5–10 | |
Win | 1–3 | M15 Telavi, Georgia | World Tennis Tour | Clay | Maksim Tikhomirov | Yan Bondarevskiy George Tsivadze | 6–4, 6–4 | |
Loss | 1–4 | M15 Johannesburg, South Africa | World Tennis Tour | Hard | David Pichler | Benjamin Lock Courtney John Lock | 3–6, 4–6 | |
Win | 2–4 | M15 Pretoria, South Africa | World Tennis Tour | Hard | Raheel Manji | David Pichler Mehluli Sibanda | 6–2, 7–5 | |
Loss | 2–5 | M25 Říčany, Czech Republic | World Tennis Tour | Clay | Colin Sinclair | Toby Kodat Adam Pavlásek | 3–6, 5–7 | |
Win | 3–5 | M15 Sozopol, Bulgaria | World Tennis Tour | Hard | Billy Harris | Yan Bondarevskiy Kai Wehnelt | 6–1, 6–4 | |
Win | 4–5 | M25 Saint-Dizier, France | World Tennis Tour | Hard (i) | Petros Tsitsipas | Blake Ellis Tristan Schoolkate | 6–4, 4–6, 10–7 | |
Win | 5–5 | M25 Villers-lès-Nancy, France | World Tennis Tour | Hard (i) | Petros Tsitsipas | Blake Ellis Tristan Schoolkate | 7–6(7–2), 3–2 ret. | |
Win | 6–5 | M25 Monastir, Tunisia | World Tennis Tour | Hard | Théo Arribagé | Dan Added Clément Tabur | 6–2, 5–7, 10–7 | |
Loss | 6–6 | M25 Monastir, Tunisia | World Tennis Tour | Hard | Zvonimir Babić | Théo Arribagé Titouan Droguet | 6–1, 4–6, 8–10 | |
Win | 7–6 | M15 Sarajevo, Bosnia & Herzegovina | World Tennis Tour | Clay | David Pichler | Constantin Bittoun Kouzmine Michael Vrbenský | 5–7, 7–6(7–2), 12–10 | |
Win | 8–6 | M15 Alkmaar, Netherlands | World Tennis Tour | Clay | Karl Friberg | Patrik Rikl Matěj Vocel | 3–6, 3–3 ret. | |
Win | 9–6 | M15 Sozopol, Bulgaria | World Tennis Tour | Hard | Vladyslav Orlov | Tuna Altuna Olaf Pieczkowski | 6–2, 3–6, 10–5 | |
Loss | 9–7 | M25 Heraklion, Greece | World Tennis Tour | Hard | Tim Sandkaulen | Sandro Kopp Neil Oberleitner | 7–6(7–2), 3–6, 7–10 | |
Win | 10–7 | M15 Monastir, Tunisia | World Tennis Tour | Hard | Ray Ho | Bogdan Bobrov Christoph Negritu | 7–5, 6–3 | |
Loss | 10–8 | M15 Antalya, Turkey | World Tennis Tour | Clay | Egor Agafonov | Anton Chekhov Ivan Nedelko | 6–4, 4–6, 8–10 | |
Loss | 10–9 | M15 Štore, Slovenia | World Tennis Tour | Clay | Dominik Kellovský | Matthew William Donald Jakub Nicod | 2–6, 2–6 | |
Loss | 10–10 | M15 Celje, Slovenia | World Tennis Tour | Clay | Zaharije-Zak Talic | Buvaysar Gadamauri Jakub Nicod | 2–6, 3–6 | |
Loss | 10–11 | M15 Monastir, Tunisia | World Tennis Tour | Hard | Tiago Pereira | Daniel De Jonge John Sperle | w/o | |
Win | 11–11 | M15 Monastir, Tunisia | World Tennis Tour | Hard | Tiago Pereira | Christoph Negritu Michael Zhu | 6–2, 2–1, ret. | |
Win | 12–11 | M15 Monastir, Tunisia | World Tennis Tour | Hard | Tao Mu | Igor Kudriashov Aleksandr Lobanov | 6–0, 3–6, 12–10 | |
Win | 13–11 | M25 Faro, Portugal | World Tennis Tour | Hard | Tiago Pereira | Simon Freund Johannes Ingildsen | 6–4, 3–6, 10–7 | |
Loss | 13–12 | M25 Quinta do Lago, Portugal | World Tennis Tour | Hard | Tiago Pereira | Gabriel Décamps Eero Vasa | 2–7, 7–6(7–3), 7–10 | |
Win | 14–12 | M25 Vale do Lobo, Portugal | World Tennis Tour | Hard | Tiago Pereira | Alberto Barroso Campos Imanol López Morillo | 6–4, 4–6, 10–8 | |
Win | 15–12 | M25 Loulé, Portugal | World Tennis Tour | Hard | Tiago Pereira | Dan Added Jakub Nicod | 7–6(8–6), 2–6, 10–1 | |
Win | 16–12 | M25 Monastir, Tunisia | World Tennis Tour | Hard | Tiago Pereira | Jordan Chiu Fred Simonsson | 6–4, 6–2 | |
Win | 17–12 | M15 Hillcrest, South Africa | World Tennis Tour | Hard | Alec Beckley | Vasilios Caripi Jesse Flores | 7–6(7–5), 6–4 | |
Loss | 17–13 | Segovia, Spain | Challenger | Hard | Tiago Pereira | Dan Added Arthur Reymond | 4–6, 3–6 | |
Win | 18–13 | M15 Valencia, Spain | World Tennis Tour | Clay | Bruno Pujol Navarro | Diego Fernández Flores Mario Mansilla Díez | 6–4, 6–2 | |
Win | 19–13 | M25 Monastir, Tunisia | World Tennis Tour | Hard | Bruno Pujol Navarro | Aziz Ouakaa Lukáš Pokorný | 7–6(7–4), 4–6, 10–5 | |
Loss | 19–14 | M25 Esch-sur-Alzette, Luxembourg | World Tennis Tour | Hard | Bruno Pujol Navarro | Sandro Kopp Michael Vrbenský | 6–3, 6–7(2–7), 3–10 | |
Win | 20–14 | M15 Pretoria, South Africa | World Tennis Tour | Hard | Izan Almazán Valiente | Tristan Stringer Stefan Vujic | 6–2, 5–7, 10–7 | |
Loss | 20–15 | M15 Pretoria, South Africa | World Tennis Tour | Hard | Izan Almazán Valiente | Tuncay Duran Alp Horoz | w/o | |
Win | 21–15 | Kigali, Rwanda | Challenger | Clay | Siddhant Banthia | Geoffrey Blancaneaux Zdeněk Kolář | 6–4, 5–7, 10–8 | |
Loss | 21–16 | Tunis, Tunisia | Challenger | Clay | Siddhant Banthia | Hynek Bartoň Michael Vrbenský | 7–5, 4–6, 7–10 | |
Loss | 21–17 | Braga, Portugal | Challenger | Clay | Stefan Latinović | Marcelo Demoliner Orlando Luz | 5–7, 7–5, 7–10 |
{class=wikitable |
World Group (0–0) |
WG Play-off (0–0) |
Group I (3–2) |
Group II (3–2) |
Group III (0–0) |
Group IV (0–0) |
Hard (3–3) |
Clay (3–1) |
Grass (0–0) |
Carpet (0–0) |
Singles (1–0) |
Doubles (5–4) |
Defeat | 1 | I | Doubles (with Alexandar Lazarov) | South Africa | Raven Klaasen / Ruan Roelofse | 3–6, 2–6 |
Victory | 2 | V | Singles | Costa Rica | Rodrigo Crespo Piedra | 6–2, 6–4 |
Victory | 3 | III | Doubles (with Alexandar Lazarov) | Paraguay | Juan Borba / Hernando José Escurra Isnardi | 6–3, 7–5 |
Victory | 4 | III | Doubles (with Alexandar Lazarov) | South Africa | Lleyton Cronje / Raven Klaasen | 6–3, 7–6(8–6) |
Defeat | 5 | III | Doubles (with Petr Nesterov) | New Zealand | Artem Sitak / Michael Venus | 4–6, 6–3, 3–6 |
Victory | 6 | III | Doubles (with Alexandar Lazarov) | Kazakhstan | Alexander Bublik / Aleksandr Nedovyesov | 6–3, 6–3 |
Defeat | 7 | III | Doubles (with Alexandar Lazarov) | Bosnia and Herzegovina | Mirza Bašić / Damir Džumhur | 6–7(10–12), 3–6 |
Defeat | 8 | III | Doubles (with Petr Nesterov) | El Salvador | Marcelo Arévalo / César Cruz | 7–5, 6–7(4–7), 3–6 |
Victory | 9 | III | Doubles (with Petr Nesterov) | Romania | Gabi Adrian Boitan / Victor Vlad Cornea | 6–3, 6–3 |
Victory | 8 | III | Doubles (with Petr Nesterov) | Finland | Harri Heliövaara / Otto Virtanen | 6–4, 1–6, 7–6(7–1) |
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