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. 183 achieved on 14 September 2026.
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 LegendATP Challenger (0–0)ITF Futures (1–0)Finals by surfaceHard (1–0)Clay (0–0) ResultW–LDateTournamentTierSurfaceOpponentScoreWin1–0M25 Sharm El Sheikh, EgyptWorld Tennis TourHard Grigory Shebekin6–0, 6-3 Doubles: 2 (2 titles) LegendATP Challenger Tour (2–0)
ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreWin1–0Târgu Mureș, RomaniaChallengerHard Dominik Reček Simone Agostini Tommaso Compagnucci6–2, 5–7, [11–9]Win2–0Augsburg, GermanyChallengerClay Dominik Reček Juan Manuel La Serna Eduardo Ribeiro6–2, 6–3
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