Jonáš Forejtek

Jonáš Forejtek
Country (sports) Czech Republic
Born (2001-03-10) 10 March 2001
Plzeň, Czech Republic
PlaysRight-handed (two-handed backhand)
CoachSláva Doseděl
Prize money$211,222
Singles
Career record3–1
Career titles0
Highest rankingNo. 217 (1 August 2022)
Current rankingNo. 455 (20 October 2025)
Grand Slam singles results
WimbledonQ1 (2022)
US OpenQ1 (2022)
Doubles
Career record0–1
Career titles5 Challenger
Highest rankingNo. 300 (27 October 2025)
Current rankingNo. 300 (27 October 2025)
Team competitions
Davis Cup2–0
Last updated on: 27 October 2025.

Jonáš Forejtek (born 10 March 2001) is a professional tennis player from the Czech Republic. Forejtek has a career high ATP singles ranking of World No. 217, achieved on 1 August 2022. He also has a career high ATP doubles ranking of No. 300, achieved on 27 October 2025. He won the 2019 Junior singles US Open. He reached the ITF world No. 1 Junior combined ranking on 9 September 2019.

Forejtek has reached ten career singles finals, with a record of 5 wins and 5 losses all on the ITF Futures Tour. Additionally, he has reached ten career doubles finals, with a record of 8 wins and 2 losses which includes a 5–1 record in ATP Challenger Tour finals.