Kristof Vliegen (born 22 June 1982) is a Belgian tennis coach and a former professional player.
| {class="wikitable" |
| Grand Slam tournaments (0–0) |
| ATP World Tour Finals (0–0) |
| ATP World Tour Masters 1000 (0–0) |
| ATP World Tour 500 Series (0–0) |
| ATP World Tour 250 Series (0–2) |
| Hard (0–1) |
| Clay (0–1) |
| Grass (0–0) |
| Carpet (0–0) |
| Outdoor (0–2) |
| Indoor (0–0) |
| Loss | 0–1 | Adelaide, Australia | International Series | Hard | Nikolay Davydenko | 2–6, 6–7(3–7) | |
| Loss | 0–2 | Munich, Germany | International Series | Clay | Olivier Rochus | 4–6, 2–6 |
| {class="wikitable" |
| Grand Slam tournaments (0–0) |
| ATP World Tour Finals (0–0) |
| ATP World Tour Masters 1000 (0–0) |
| ATP World Tour 500 Series (0–0) |
| ATP World Tour 250 Series (0–2) |
| Hard (0–2) |
| Clay (0–0) |
| Grass (0–0) |
| Carpet (0–0) |
| Outdoor (0–2) |
| Indoor (0–0) |
| Loss | 0–1 | Stockholm Open, Sweden | International Series | Hard | Olivier Rochus | Paul Hanley Kevin Ullyett | 6–7(2–7), 4–6 | |
| Loss | 0–2 | Atlanta, United States | 250 Series | Hard | Rohan Bopanna | Scott Lipsky Rajeev Ram | 3–6, 7–6(7–4), 10–12 |
| {class=wikitable style=font-size:97% !Legend |
| ATP Challenger (9–4) |
| ITF Futures (2–1) |
| Hard (5–1) |
| Clay (6–4) |
| Grass (0–0) |
| Carpet (0–0) |
| Loss | 0–1 | Luxembourg F2, Luxembourg | Futures | Clay | Jordane Doble | 4–4 ret. | |
| Win | 1–1 | France F6, Lille | Futures | Hard | Jérôme Haehnel | 7–6(7–3), 7–6(7–3) | |
| Win | 2–1 | Germany F6, Oberweier | Futures | Clay | Daniel Elsner | 6–1, 1–0 ret. | |
| Win | 3–1 | Geneva, Switzerland | Challenger | Clay | Galo Blanco | 6–2, 6–2 | |
| Win | 4–1 | Zagreb Open, Croatia | Challenger | Clay | Rubén Ramírez Hidalgo | 6–1, 4–6, 6–0 | |
| Win | 5–1 | Groningen, Netherlands | Challenger | Hard | Joachim Johansson | 6–4, 6–4 | |
| Loss | 5–2 | Barcelona, Spain | Challenger | Clay | Stan Wawrinka | 4–6, 3–6 | |
| Loss | 5–3 | Paget, Bermuda | Challenger | Clay | Tomáš Zíb | 7–6(10–8), 6–7(6–8), 1–6 | |
| Loss | 5–4 | Scheveningen, Netherlands | Challenger | Clay | Melle van Gemerden | 4–6, 3–6 | |
| Loss | 5–5 | Ethias Trophy, Belgium | Challenger | Hard | Ernests Gulbis | 5–7, 3–6 | |
| Win | 6–5 | Wrocław, Poland | Challenger | Hard | Jürgen Melzer | 6–4, 3–6, 6–3 | |
| Win | 7–5 | Geneva, Switzerland | Challenger | Clay | Yuri Schukin | 6–2, 6–1 | |
| Win | 8–5 | Düsseldorf, Germany | Challenger | Clay | Andreas Beck | 6–0, 6–3 | |
| Win | 9–5 | Grenoble, France | Challenger | Hard | Alexandre Sidorenko | 6–4, 6–3 | |
| Win | 10–5 | Besançon, France | Challenger | Hard | Andreas Beck | 6–2, 6–7(8–10), 6–3 | |
| Win | 11–5 | Scheveningen, Netherlands | Challenger | Clay | Albert Montañés | 4–2 ret. |
| {class=wikitable style=font-size:97% !Legend |
| ATP Challenger (4–3) |
| ITF Futures (3–0) |
| Hard (1–2) |
| Clay (6–1) |
| Grass (0–0) |
| Carpet (0–0) |
| Win | 1–0 | France F2, Angers | Futures | Clay | Wim Neefs | Vitali Shvets Relja Dulic-Fiser | 6–1, 6–3 | |
| Win | 2–0 | France F4, Deauville | Futures | Clay | Wim Neefs | Kim Tiilikainen Jan Weinzierl | 6–3, 7–6(7–3) | |
| Win | 3–0 | Netherlands F1, Enschede | Futures | Clay | Stefan Wauters | Bart De Gier Michel Koning | 7–6(7–4), 6–1 | |
| Win | 4–0 | Barletta, Italy | Challenger | Clay | Tom Vanhoudt | Yuri Schukin Lukáš Dlouhý | 6–4, 5–7, 7–5 | |
| Loss | 4–1 | Scheveningen, Netherlands | Challenger | Clay | Steve Darcis | Julien Benneteau Édouard Roger-Vasselin | 7–5, 5–7, 6–7(5–7) | |
| Win | 5–1 | Sunrise, United States | Challenger | Hard | Konstantinos Economidis | Sebastián Prieto Juan Martín del Potro | 6–3, 6–4 | |
| Loss | 5–2 | Istanbul, Turkey | Challenger | Hard | Dick Norman | James Auckland Ross Hutchins | 7–5, 6–7(5–7), 7–10 | |
| Loss | 5–3 | Sunrise, United States | Challenger | Hard | Peter Wessels | Janko Tipsarević Dušan Vemić | 2–6, 6–7(6–8) | |
| Win | 6–3 | Freudenstadt, Germany | Challenger | Clay | Dick Norman | Rainer Eitzinger Armin Sandbichler | 6–3, 6–3 | |
| Win | 7–3 | Tunis, Tunisia | Challenger | Clay | Jeff Coetzee | James Cerretani Adil Shamasdin | 7–6(7–3), 6–3 |
| Win | 2000 | Wimbledon Championships | Grass | Dominique Coene | Andrew Banks Benjamin Riby | 6–3, 1–6, 6–3 |
| Grand Slam tournaments | |||||||||||||||||||
| Australian Open | Q2 | Q3 | Q1 | 3R | 1R | 2R | 1R | 1R !0 / 5 !3–5 ! | |||||||||||
| French Open | Q1 | 1R | 2R | 1R | 3R | 1R | 1R | 1R !0 / 7 !3–7 ! | |||||||||||
| Wimbledon | Q1 | 1R | Q1 | 2R | 2R | 1R | 2R | 1R !0 / 6 !3–6 ! | |||||||||||
| US Open | 1R | 1R | Q1 | 1R | 1R | A | A | 1R !0 / 5 !0–5 ! | |||||||||||
| ATP World Tour Masters 1000 | |||||||||||||||||||
| Indian Wells | A | A | A | 2R | 1R | A | A | A !0 / 2 !1–2 ! | |||||||||||
| Miami Masters | Q2 | A | A | 3R | 1R | 1R | A | A !0 / 3 !2–3 ! | |||||||||||
| Monte Carlo | A | A | A | 3R | 3R | 2R | 1R | A !0 / 4 !5–4 ! | |||||||||||
| Madrid | A | 1R | A | 3R | Q2 | A | A | A !0 / 2 !2–2 ! | |||||||||||
| Rome Masters | Q2 | A | A | A | Q1 | A | A | A !0 / 0 !0–0 ! | |||||||||||
| Hamburg | A | A | A | 2R | Q1 | 1R | NMS !0 / 2 !1–2 ! | ||||||||||||
| Canada Masters | A | A | A | 1R | A | A | A | A !0 / 1 !0–1 ! | |||||||||||
| Cincinnati | A | A | A | 2R | A | A | A | A !0 / 1 !1–1 ! | |||||||||||
| Paris Masters | A | Q1 | 2R | 2R | Q2 | Q1 | A | A !0 / 2 !2–2 ! | |||||||||||
| Grand Slam tournaments | ||||||||||||||||
| Australian Open | A | A | A | 2R | 2R | 2R | 1R | 1R !0 / 5 !3–5 ! | ||||||||
| French Open | 2R | A | A | 2R | 3R | 1R | A | 1R !0 / 5 !4–5 ! | ||||||||
| Wimbledon | Q1 | A | A | 2R | 2R | 1R | A | 1R !0 / 4 !2–4 ! | ||||||||
| US Open | A | A | A | 3R | 2R | A | A | 1R !0 / 3 !3–3 ! | ||||||||
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