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Daniel Siniakov (born 15 January 2003) is a Czech tennis player. Siniakov has a career high ATP singles ranking of No. 482 achieved on 8 June 2026 and a career high ATP doubles ranking of No. 293 achieved on 20 April 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
ATP Challenger (0–0)
ITF Futures (1–0)
Finals by surface
Hard (1–0)
Clay (0–0)
Result W–L    Date    Tournament Tier Surface Opponent Score
Win 1–0 April 2026 M25 Sharm El Sheikh, Egypt World Tennis Tour Hard Grigory Shebekin 6–0, 6-3

Doubles: 1 (1 title)

Legend
ATP Challenger Tour (1–0)
Result W–L    Date    Tournament Tier Surface Partner Opponents Score
Win 1–0 Sep 2025 Târgu Mureș, Romania Challenger Hard Czech Republic Dominik Reček Italy Simone Agostini
Italy Tommaso Compagnucci
6–2, 5–7, [11–9]

References