Daniel Vacek (born 1 April 1971) is a former tennis player from Czechoslovakia and the Czech Republic who turned professional in 1990. He reached the quarterfinals of the 1995 Paris Masters, the 1998 Canada Masters and the 1998 Cincinnati Masters, and achieved a career-high singles ranking of world No. 26 in January 1996.
Vacek represented his native country at the 1996 Summer Olympics in Atlanta where he was defeated in the second round. The right-hander won 25 career titles in doubles with various partners, including the French Open in 1996 and 1997, and the US Open in 1997 with Yevgeny Kafelnikov.
| { class="wikitable sortable mw-collapsible " |
| Grand Slam (3) |
| Tennis Masters Cup (0) |
| ATP International Series Gold (5) |
| ATP Tour (16) |
| Hard (10) |
| Clay (10) |
| Grass (0) |
| Carpet (5) |
| Win | 1. | 1990 | Umag, Yugoslavia | Clay | Vojtěch Flégl | Andrei Cherkasov Andrei Olhovskiy | 6–4, 6–4 |
| Win | 2. | 1990 | ATP Prague, Czechoslovakia | Clay | Vojtěch Flégl | George Cosac Florin Segărceanu | 5–7, 6–4, 6–3 |
| Win | 3. | 1990 | San Marino | Clay | Vojtěch Flégl | Jordi Burillo Marcos Aurelio Górriz | 6–1, 4–6, 7–6 |
| Loss | 1. | 1991 | ATP Prague, Czechoslovakia | Clay | Libor Pimek | Vojtěch Flégl Cyril Suk | 4–6, 2–6 |
| Loss | 2. | 1991 | Berlin Open, Germany | Carpet (i) | Jan Siemerink | Petr Korda Karel Nováček | 6–3, 5–7, 5–7 |
| Loss | 3. | 1992 | Wellington, New Zealand | Hard | Michiel Schapers | Jared Palmer Jonathan Stark | 3–6, 3–6 |
| Loss | 4. | 1993 | Copenhagen Open, Denmark | Carpet (i) | Martin Damm | David Adams Andrei Olhovskiy | 3–6, 6–3, 3–6 |
| 4. | 1993 | New Haven, United States | Hard | Cyril Suk | Steve DeVries David Macpherson | 7–5, 6–4 | |
| Win | 5. | 1994 | Marseille Open, France | Carpet (i) | Jan Siemerink | Martin Damm Yevgeny Kafelnikov | 6–7, 6–4, 6–1 |
| 5. | 1994 | Monte Carlo, Monaco | Clay | Yevgeny Kafelnikov | Nicklas Kulti Magnus Larsson | 6–3, 6–7, 4–6 | |
| Loss | 6. | 1994 | Gstaad, Switzerland | Clay | Menno Oosting | Sergio Casal Emilio Sánchez | 6–7, 4–6 |
| Win | 6. | 1994 | Toulouse, France | Hard (i) | Menno Oosting | Patrick McEnroe Jared Palmer | 7–6, 6–7, 6–3 |
| 7. | 1995 | Eurocard Open, Germany | Carpet (i) | Cyril Suk | Grant Connell Patrick Galbraith | 2–6, 2–6 | |
| Win | 7. | 1995 | ATP Nice, France | Clay | Cyril Suk | Luke Jensen David Wheaton | 3–6, 7–6, 7–6 |
| 8. | 1995 | Rome Masters, Italy | Clay | Cyril Suk | Jan Apell Jonas Björkman | 6–3, 6–4 | |
| Win | 9. | 1995 | Long Island, United States | Hard | Cyril Suk | Rick Leach Scott Melville | 5–7, 7–6, 7–6 |
| Loss | 8. | 1995 | Open Romania, Romania | Clay | Cyril Suk | Mark Keil Jeff Tarango | 4–6, 6–7 |
| Win | 10. | 1995 | Basel, Switzerland | Hard (i) | Cyril Suk | Mark Keil Peter Nyborg | 3–6, 6–3, 6–3 |
| 9. | 1995 | Eurocard Open, Germany | Carpet (i) | Cyril Suk | Jacco Eltingh Paul Haarhuis | 5–7, 4–6 | |
| Win | 11. | 1996 | ATP Prague, Czech Republic | Clay | Yevgeny Kafelnikov | Luis Lobo Javier Sánchez | 6–3, 6–7, 6–3 |
| Win | 12. | 1996 | French Open, Paris | Clay | Yevgeny Kafelnikov | Jakob Hlasek Guy Forget | 6–2, 6–3 |
| Loss | 10. | 1996 | Halle, Germany | Grass | Yevgeny Kafelnikov | Byron Black Grant Connell | 1–6, 5–7 |
| Win | 13. | 1996 | Basel, Switzerland | Hard (i) | Yevgeny Kafelnikov | David Adams Menno Oosting | 6–3, 6–4 |
| Win | 14. | 1996 | Vienna, Austria | Carpet (i) | Yevgeny Kafelnikov | Pavel Vízner Menno Oosting | 7–6, 6–4 |
| 11. | 1996 | Paris Masters, France | Carpet (i) | Yevgeny Kafelnikov | Jacco Eltingh Paul Haarhuis | 4–6, 6–4, 6–7 | |
| Loss | 12. | 1997 | St. Petersburg, Russia | Carpet (i) | David Prinosil | Andrei Olhovskiy Brett Steven | 4–6, 3–6 |
| Win | 15. | 1997 | Hong Kong | Hard | Martin Damm | Karsten Braasch Jeff Tarango | 6–3, 6–4 |
| 16. | 1997 | Tokyo, Japan | Hard | Martin Damm | Justin Gimelstob Patrick Rafter | 2–6, 6–2, 7–6 | |
| Win | 17. | 1997 | French Open, Paris | Clay | Yevgeny Kafelnikov | Todd Woodbridge Mark Woodforde | 7–6(14–12), 4–6, 6–3 |
| Win | 18. | 1997 | Gstaad, Switzerland | Clay | Yevgeny Kafelnikov | Trevor Kronemann David Macpherson | 4–6, 7–6, 6–3 |
| Win | 19. | 1997 | US Open, New York | Hard | Yevgeny Kafelnikov | Jonas Björkman Nicklas Kulti | 7–6, 6–3 |
| 13. | 1998 | Milan Indoor, England | Carpet (i) | Yevgeny Kafelnikov | Martin Damm Jim Grabb | 4–6, 5–7 | |
| Loss | 14. | 1998 | Los Angeles, United States | Hard | Jeff Tarango | Patrick Rafter Sandon Stolle | 4–6, 4–6 |
| 20. | 1998 | Vienna, Austria | Carpet (i) | Yevgeny Kafelnikov | David Adams John-Laffnie de Jager | 7–5, 6–3 | |
| Loss | 15. | 1998 | Kremlin Cup, Russia | Carpet (i) | Yevgeny Kafelnikov | Jared Palmer Jeff Tarango | 4–6, 7–6, 2–6 |
| Win | 21. | 1999 | ATP Auckland, New Zealand | Hard | Jeff Tarango | Jiří Novák David Rikl | 7–5, 7–5 |
| Win | 22. | 1999 | St. Petersburg, Russia | Carpet (i) | Jeff Tarango | Menno Oosting Andrei Pavel | 3–6, 6–3, 7–5 |
| 23. | 1999 | Tokyo, Japan | Hard | Jeff Tarango | Wayne Black Brian MacPhie | 4–3 ret. | |
| Win | 24. | 1999 | Kremlin Cup, Russia | Carpet (i) | Justin Gimelstob | Andriy Medvedev Marat Safin | 6–2, 6–1 |
| 25. | 2002 | Open Seat, Spain | Clay | Michael Hill | Lucas Arnold Ker Gastón Etlis | 6–4, 6–4 |
| Grand Slam tournaments | |||||||||||||||||
| Australian Open | A | A | 1R | 2R | 1R | 2R | 2R | 3R | A | 1R | QF | 1R | A | 3R | A | 0 / 10 | 10–10 |
| French Open | A | A | 2R | 1R | A | A | 2R | W | W | 2R | QF | A | A | 1R | 1R | 2 / 9 | 18–7 |
| Wimbledon | A | A | 2R | 2R | 2R | 1R | 1R | 1R | 1R | 3R | 1R | A | A | 1R | 1R | 0 / 11 | 5–11 |
| US Open | A | A | 1R | 1R | 1R | 1R | 2R | 1R | W | 2R | 1R | A | 1R | A | A | 1 / 10 | 8–9 |
| Grand Slam SR | 0 / 0 | 0 / 0 | 0 / 4 | 0 / 4 | 0 / 3 | 0 / 3 | 0 / 4 | 1 / 4 | 2 / 3 | 0 / 4 | 0 / 4 | 0 / 1 | 0 / 1 | 0 / 3 | 0 / 2 | 3 / 40 | N/A |
| Annual win–loss | 0–0 | 0–0 | 2–4 | 2–4 | 1–3 | 1–3 | 3–4 | 8–3 | 12–1 | 4–4 | 6–4 | 0–1 | 0–1 | 2–3 | 0–2 | N/A | 41–37 |
| Masters Series | |||||||||||||||||
| Indian Wells | NME | A | A | A | A | A | A | A | A | QF | 1R | 2R | A | A | A | 0 / 3 | 2–3 |
| Miami Masters | NME | A | A | A | A | SF | 2R | A | A | QF | 2R | 3R | A | 1R | A | 0 / 6 | 7–6 |
| Monte Carlo | NME | A | A | A | A | F | 1R | 1R | SF | 2R | QF | 1R | A | A | A | 0 / 7 | 8–7 |
| Rome Masters | NME | A | A | A | A | 2R | W | 1R | 2R | QF | 2R | 1R | A | 2R | A | 1 / 8 | 11–7 |
| Hamburg Masters | NME | A | A | A | A | 2R | 1R | QF | A | A | QF | 1R | A | 2R | A | 0 / 6 | 6–6 |
| Canada Masters | NME | A | A | A | A | A | 2R | 1R | QF | 2R | 1R | A | QF | 1R | A | 0 / 7 | 4–7 |
| Cincinnati | NME | A | A | A | A | QF | 1R | 2R | 2R | SF | 2R | A | A | 1R | A | 0 / 7 | 5–7 |
| Madrid (Stuttgart) | NME | A | A | A | A | 2R | F | 2R | 2R | QF | 2R | A | A | A | A | 0 / 6 | 5–6 |
| Paris Masters | NME | A | A | A | A | QF | 2R | F | 2R | 2R | QF | A | A | A | A | 0 / 6 | 8–6 |
| Masters Series SR | N/A | 0 / 0 | 0 / 0 | 0 / 0 | 0 / 0 | 0 / 7 | 1 / 8 | 0 / 7 | 0 / 6 | 0 / 8 | 0 / 9 | 0 / 5 | 0 / 1 | 0 / 5 | 0 / 0 | 1 / 56 | N/A |
| Annual win–loss | N/A | 0–0 | 0–0 | 0–0 | 0–0 | 13–7 | 7–7 | 5–7 | 4–6 | 10–8 | 9–9 | 3–5 | 2–1 | 2–5 | 0–0 | N/A | 56–55 |
| Year-end ranking | 325 | 103 | 54 | 160 | 58 | 21 | 11 | 8 | 5 | 26 | 20 | 143 | 113 | 65 | 1204 | N/A | |
| 1R | Christian Bergström | No. 85 | 6–3, 1–1 ret. | No. 104 |
| 2R | Andrea Gaudenzi | No. 66 | 6–3, 6–2, 6–2 | |
| 3R | Wayne Ferreira (13) | No. 18 | 6–4, 2–6, 6–7(4–7), 4–6 |
| 1R | Javier Sánchez | No. 24 | 7–6(7–3), 0–6, 6–2, 6–4 | No. 61 |
| 2R | Magnus Gustafsson (13) | No. 13 | 0–6, 6–4, 7–6(7–4), 6–4 | |
| 3R | Jacco Eltingh | No. 62 | 6–7(6–8), 6–7(4–7), 6–3, 3–6 | |
| 1R | Sjeng Schalken | No. 54 | 1–6, 6–2, 6–4, 7–5 | No. 77 |
| 2R | Jan-Michael Gambill | No. 66 | 6–4, 2–6, 7–5, 7–6(7–0) | |
| 3R | Marat Safin (Q) | No. 116 | 3–6, 6–3, 3–6, 5–7 | |
| 1R | Gérard Solvès | No. 118 | 6–4, 6–2, 4–6, 2–6, 6–2 | No. 51 |
| 2R | Mark Woodforde | No. 54 | 6–3, 7–6(7–2), 6–4 | |
| 3R | Yevgeny Kafelnikov (15) | No. 16 | 4–6, 7–5, 6–4, 3–6, 6–4 | |
| 4R | Pete Sampras (1) | No. 1 | 4–6, 1–6, 6–7(5–7) |
| 1R | Martin Sinner | No. 52 | 6–4, 6–7(6–8), 6–3, 2–6, 7–6(7–4) | No. 67 |
| 2R | Sergi Bruguera (11) | No. 11 | 6–2, 6–3, 6–4 | |
| 3R | Nicolás Pereira (Q) | No. 105 | 4–6, 7–6(7–5), 6–2, 7–6(7–3) | |
| 4R | Patrick McEnroe | No. 42 | 6–7(8–10), 3–6, 4–6 | |
| 1R | Laurence Tieleman (Q) | No. 339 | 4–6, 6–4, 1–6, 6–3, 6–2 | No. 83 |
| 2R | Michael Sell (Q) | No. 239 | 4–6, 7–6(7–5), 6–1, 6–2 | |
| 3R | Mark Philippoussis (14) | No. 19 | 7–6(7–4), 7–5, 6–2 | |
| 4R | Greg Rusedski | No. 20 | 6–7(2–7), 2–6, 2–6 | |
| 1R | Jeff Coetzee Sander Groen | No. 129 No. 116 | 6–4, 2–6, 6–3 | No. 23 |
| 2R | Jiří Novák David Rikl | No. 30 No. 38 | 6–3, 6–7(0–7), 9–7 | |
| 3R | Lucas Arnold Ker Pavel Vízner | No. 107 No. 62 | 6–3, 3–6, 6–4 | |
| QF | Todd Woodbridge (2) Mark Woodforde (2) | No. 6 No. 6 | 6–7(3–7), 3–6, 1–6 |
| 1R | Jérôme Golmard Lionel Roux | No. 330 No. 249 | 6–0, 6–3 | No. 22 |
| 2R | Kelly Jones Chris Woodruff | No. 87 No. 155 | 6–3, 6–3 | |
| 3R | Luis Lobo (10) Javier Sánchez (10) | No. 26 No. 25 | 7–6(10–8), 7–5 | |
| QF | Donald Johnson Francisco Montana | No. 98 No. 68 | 6–2, 7–6(10–8) | |
| SF | Jared Palmer Jonathan Stark | No. 74 No. 48 | 6–4, 7–6(7–4) | |
| F | Guy Forget (5) Jakob Hlasek (5) | No. 19 No. 9 | 6–2, 6–3 | |
| 1R | Rikard Bergh David Ekerot | No. 125 No. 61 | 6–1, 5–7, 6–3 | No. 5 |
| 2R | Tom Nijssen Stephen Noteboom | No. 74 No. 94 | 6–1, 6–4 | |
| 3R | Wayne Black Jim Grabb | No. 141 No. 38 | 6–4, 7–6(7–4) | |
| QF | Karsten Braasch Jens Knippschild | No. 72 No. 83 | 4–6, 7–6(7–2), 6–3 | |
| SF | Jacco Eltingh (2) Paul Haarhuis (2) | No. 4 No. 3 | 7–6(7–4), 7–6(7–3) | |
| F | Todd Woodbridge (1) Mark Woodforde (1) | No. 1 No. 1 | 7–6(14–12), 4–6, 6–3 | |
| 1R | Nick Gould (WC) Mark Petchey (WC) | No. 328 No. 255 | 6–3, 6–0 | No. 17 |
| 2R | Brandon Coupe David DiLucia | No. 74 No. 125 | 6–1, 6–4 | |
| 3R | Nicklas Kulti (10) David Macpherson (10) | No. 20 No. 19 | 6–7(3–7), 3–6 |
| 1R | Óscar Ortiz (Q) André Sá (Q) | No. 142 No. 172 | 6–3, 6–2 | No. 6 |
| 2R | Patrik Fredriksson Tom Vanhoudt | No. 113 No. 90 | 4–6, 6–2, 6–1 | |
| 3R | Donald Johnson (13) Francisco Montana (13) | No. 27 No. 30 | 1–6, 6–3, 6–4 | |
| QF | John-Laffnie de Jager (Q) Robbie Koenig (Q) | No. 163 No. 222 | 7–5, 7–5 | |
| SF | Mahesh Bhupathi (10) Leander Paes (10) | No. 19 No. 23 | 7–6, 7–6 | |
| F | Jonas Björkman (11) Nicklas Kulti (11) | No. 26 No. 29 | 7–6, 6–3 |
|
|