Daniel Siniakov| Country (sports) |  Czech Republic |
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| Born | (2003-01-15) 15 January 2003
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| Height | 1.83 m (6 ft 0 in) |
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| Plays | Right-handed (two-handed backhand) |
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| Prize money | US $70,582 |
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| Career record | 0–0 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
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| Career titles | 0 |
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| Highest ranking | No. 438 (13 July 2026) |
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| Current ranking | No. 498 (24 August 2026) |
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| Career record | 0–0 (at ATP Tour level, Grand Slam level, and in Davis Cup) |
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| Career titles | 1 Challenger, 5 ITF |
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| Highest ranking | No. 227 (24 August 2026) |
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| Current ranking | No. 227 (24 August 2026) |
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| Last updated on: 25 August 2026. |
Daniel Siniakov (born 15 January 2003) is a Czech tennis player. Siniakov has a career high ATP singles ranking of No. 438 achieved on 13 July 2026 and a career high ATP doubles ranking of No. 227 achieved on 24 August 2026.[1]
Siniakov has won one ATP Challenger doubles title at the 2025 INTARO Open II.
Daniel is younger brother of Grand Slam champion and world No. 1 player Kateřina Siniaková.
ATP Challenger and ITF Tour finals
Singles: 1 title
| Legend |
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| ATP Challenger (0–0) |
| ITF Futures (1–0) |
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| Finals by surface |
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| Hard (1–0) |
| Clay (0–0) |
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| Result |
W–L |
Date |
Tournament |
Tier |
Surface |
Opponent |
Score |
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| Win |
1–0 |
April 2026 |
M25 Sharm El Sheikh, Egypt |
World Tennis Tour |
Hard |
 Grigory Shebekin |
6–0, 6-3 |
Simone Agostini