Kasidit Samrej
| Country (sports) | Thailand | |||||||||||||||||||||||||||||
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| Born | 26 January 2001 Bangkok, Thailand | |||||||||||||||||||||||||||||
| Prize money | $60,274 | |||||||||||||||||||||||||||||
| Singles | ||||||||||||||||||||||||||||||
| Career record | 3–9 (at ATP Tour level, Grand Slam level, and in Davis Cup) | |||||||||||||||||||||||||||||
| Career titles | 0 | |||||||||||||||||||||||||||||
| Highest ranking | No. 382 (26 May 2025) | |||||||||||||||||||||||||||||
| Current ranking | No. 382 (26 May 2025) | |||||||||||||||||||||||||||||
| Grand Slam singles results | ||||||||||||||||||||||||||||||
| Australian Open | 1R (2025) | |||||||||||||||||||||||||||||
| Doubles | ||||||||||||||||||||||||||||||
| Career record | 0–1 (at ATP Tour level, Grand Slam level, and in Davis Cup) | |||||||||||||||||||||||||||||
| Career titles | 0 | |||||||||||||||||||||||||||||
| Highest ranking | No. 822 (12 June 2023) | |||||||||||||||||||||||||||||
| Current ranking | No. 1118 (6 January 2025) | |||||||||||||||||||||||||||||
Medal record
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| Last updated on: 6 January 2025. | ||||||||||||||||||||||||||||||
Kasidit Samrej (Thai: กษิดิศ สำเร็จ; born 26 January 2001) is a Thai tennis player. He has a career high ATP singles ranking of world No. 382 achieved on 26 May 2025. He also has a career high ATP doubles ranking of No. 822 achieved on 12 June 2023. He is currently the No. 1 Thai player.
Samrej represents Thailand at the Davis Cup, where he has a W/L record of 10–8.
Samrej won the Asia-Pacific Wildcard Playoff for the 2025 Australian Open, making him the first Thai man to compete in the singles event in a Grand Slam tournament since Danai Udomchoke at the 2012 Australian Open. He lost in the first round to fifth seed Daniil Medvedev in five sets.