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Mats Rosenkranz (born 23 August 1998) is a German tennis player. He has a career high ATP singles ranking of world No. 254 achieved on 17 November 2025 and a career high doubles ranking of No. 389 achieved on 20 October 2025.
In the first-round qualifying match for the 2022 Mallorca Open, Rosenkranz scored his biggest win against world No. 25 Nikoloz Basilashvili in straight sets. He lost in the second qualifying round to Antoine Bellier.
He won his first ATP Challenger singles title at the 2024 Manzanillo Open defeating Venezuelan Gonzalo Oliveira.
| Hard (1–0) |
| Clay (0–0) |
| Win | 1–0 | Manzanillo Open, Mexico | Hard | Gonzalo Oliveira | 6–3, 6–4 |
| Hard (2–0) |
| Clay (1–0) |
| Win | 1–0 | Challenger de Tigre, Argentina | Clay | Conner Huertas del Pino | Matías Franco Descotte Facundo Díaz Acosta | 5–6 ret. | |
| Win | 2–0 | Crete Challenger, Greece | Hard | Harry Wendelken | Victor Vlad Cornea Patrik Niklas-Salminen | 4–6, 6–4, 10–7 | |
| Win | 3–0 | Fairfield Challenger, United States | Hard | Max Wiskandt | Spencer Johnson Wally Thayne | 3–6, 7–5, 10–6 |
| Hard (4–2) |
| Clay (1–0) |
| Grass (1–0) |
| Carpet (2–0) |
| Win | 1–0 | M15 Wetzlar, Germany | Clay | Bruno Santanna | 6–4, 6–3 | |
| Loss | 1–1 | M15 Nur-Sultan, Kazakhstan | Hard | Otto Virtanen | 5–7, 3–6 | |
| Win | 2–1 | M15 Gaiba, Italy | Grass | Benjamin Lock | 7–6(13-11), 7–6(7-5) | |
| Win | 3–1 | M25 Sarreguemines, France | Carpet (i) | Dan Added | 6–3, 3–6, 6–3 | |
| Win | 4–1 | M25 Plaisir, France | Hard | Antoine Hoang | 6–3, 6–7(3–7), 7–6(7–3) | |
| Loss | 4–2 | M15 Danderyd, Sweden | Hard (i) | Giles Hussey | 2–6, 3–6 | |
| Win | 5–2 | M25 Trimbach, Switzerland | Carpet (i) | Antoine Hoang | 6–1, 6–4 | |
| Win | 6–2 | M15 Offenbach, Germany | Hard (i) | Matthew William Donald | 6–3, 7–5 | |
| Win | 7–2 | M15 Oberhaching, Germany | Hard (i) | Marvin Möller | 6–1, 6–2 | |
| Win | 8–2 | M25 Plaisir, France | Hard (i) | Hamish Stewart | 6–3, 6–3 |
| Hard (2–3) |
| Clay (4–2) |
| Carpet (2–3) |
| Win | 1–0 | Turkey F20, Antalya | Clay | Valentin Günther | Florent Diep Francois-Arthur Vibert | 6–1, 6–2 | |
| Loss | 1–1 | Belgium F10, Damme | Clay | Valentin Günther | Corentin Denolly Francois-Arthur Vibert | 4–6, 6–2, 9–11 | |
| Win | 2–1 | Germany F15, Bad Salzdetfurth | Carpet | Petr Nouza | Altug Celikbilek Hugo Voljacques | 4–6, 6–3, 14–12 | |
| Loss | 2–2 | M15 Kaarst, Germany | Carpet | Mark Whitehouse | Igor Sijsling Botic van de Zandschulp | 4–6, 4–6 | |
| Win | 3–2 | M15 Saarlouis, Germany | Clay | James Frawley | Tom Diederich Lasse Muscheites | 6–4, 6–2 | |
| Loss | 3–3 | M15 Marburg, Germany | Clay | James Frawley | Vasile Antonescu Patrick Grigoriu | 6–7(6-8), 6–4, 6–10 | |
| Win | 4–3 | M25 Kassel, Germany | Clay | James Frawley | Sadio Doumbia Fabien Reboul | 7–5, 7–6(12-10) | |
| Win | 5–3 | M15 Wetzlar, Germany | Clay | James Frawley | Constantin Schmitz Niklas Schell | 2–6, 6–3, 12–10 | |
| Win | 6–3 | M15 Veigy-Foncenex, France | Carpet | Fabian Fallert | Ryan Nijboer Glenn Smits | 6–4, 6–3 | |
| Loss | 6–4 | M15 Monastir, Tunisia | Hard | Tom Schönenberg | Aziz Dougaz Skander Mansouri | 6–4, 6–7(1-7), 5–10 | |
| Loss | 6–5 | M15 Monastir, Tunisia | Hard | Skander Mansouri | Alexander Erler David Pichler | 2–6, 6–7(12-14) | |
| Win | 7–5 | M25 Sharm El Sheikh, Egypt | Hard | Marek Gengel | Alexander Zgirovsky Kris van Wyk | 6–2, 7–5 | |
| Win | 8–5 | M15 Danderyd, Sweden | Hard (i) | Adrian Oetzbach | Daniel De Jonge Jakob Schnaitter | 6–0, 6–3 | |
| Loss | 8–6 | M25 Trimbach, Switzerland | Carpet (i) | Tom Schönenberg | Niklas Schell Mark Whitehouse | 4–6, 4–6 | |
| Loss | 8–7 | M25 Plaisir, France | Hard (i) | Marat Sharipov | Tom Hands Harry Wendelken | 3–6, 4–6 | |
| Loss | 8–8 | M25 Trimbach, Switzerland | Carpet (i) | Niklas Schell | Ben Jones David Poljak | 5–7, 4–6 |
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