Mark Koevermans (; born 3 February 1968) is a former tennis player from the Netherlands, who turned professional in 1987. He represented his native country as a lucky loser at the 1992 Summer Olympics in Barcelona, where he was defeated in the third round by Brazil's Jaime Oncins. Going by the nickname Koef, a right-hander, won one career title in singles (Athens, 1990). He reached his highest singles ATP-ranking on 27 May 1991, when he was ranked number 37.
In April 2009, Koevermans was appointed as commercial director at Dutch football club Feyenoord.
Career finals Doubles: 16 (4 wins, 12 losses) Legend (doubles) Grand Slam tournaments (0) Tennis Masters Cup (0) ATP Masters Series (1) ATP International Series Gold (0) ATP International Series (3)
ResultW/L DateTournamentSurfacePartnerOpponentsScoreLoss 1. 1990 Casablanca, Morocco Clay Paul Haarhuis Todd Woodbridge Simon Youl 3–6, 1–6Loss 2. 1990 Hilversum, Netherlands Clay Paul Haarhuis Sergio Casal Emilio Sánchez 5–7, 5–7Loss 3. 1990 São Paulo, Brazil Carpet Luiz Mattar Shelby Cannon Alfonso Mora 7–6, 3–6, 6–7Loss 4. 1991 Adelaide, Australia Hard Paul Haarhuis Wayne Ferreira Stefan Kruger 4–6, 6–4, 4–6Win 1. 1991 Estoril, Portugal Clay Paul Haarhuis Tom Nijssen Cyril Suk 6–3, 6–3Loss 5. 1991 Monte Carlo, Monaco Clay Paul Haarhuis Luke Jensen Laurie Warder 7–5, 6–7, 4–6Win 2. 1991 Athens, Greece Clay Jacco Eltingh Menno Oosting Olli Rahnasto 5–7, 7–6, 7–5Loss 6. 1992 Rotterdam, Netherlands Carpet Paul Haarhuis Marc-Kevin Goellner David Prinosil 2–6, 7–6, 6–7Loss 7. 1992 Genova, Italy Clay Paul Haarhuis Shelby Cannon Greg Van Emburgh 1–6, 1–6Win 3. 1992 Hilversum, Netherlands Clay Paul Haarhuis Marten Renström Mikael Tillström 6–7, 6–1, 6–4Loss 8. 1992 Athens, Greece Clay Marcelo Filippini Tomás Carbonell Francisco Roig 3–6, 4–6Loss 9. 1992 Tel Aviv, Israel Hard Tobias Svantesson Mike Bauer João Cunha e Silva 3–6, 4–6Loss 10. 1993 Monte Carlo, Monaco Clay Paul Haarhuis Stefan Edberg Petr Korda 6–3, 2–6, 6–7Win 4. 1993 Hamburg, Germany Clay Paul Haarhuis Grant Connell Patrick Galbraith 6–4, 6–7, 7–6Loss 11. 1993 Florence, Italy Clay Greg Van Emburgh Tomás Carbonell Libor Pimek 6–7, 6–2, 1–6Loss 12. 1993 Genova, Italy Clay Greg Van Emburgh Sergio Casal Emilio Sánchez 3–6, 6–7
Singles (1 win) ResultW/L DateTournamentSurfaceOpponentScoreWin 1–0 Oct 1990 Athens, Greece Clay Franco Davín 5–7, 6–4, 6–1
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