ATP 616
| Best 2026: | 603 |
| Best 2025: | 670 |
| Best | 603 |
Jan Kumstat |
| Country | Czech Republic |
| Age | 19 yo / 196 cm / 83 kg |
| Forehand | Right Handed (Double hand) |
| Birthplace/Residence | Prostejov |
| Earnings | 27,883$ |
All
2026
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
Performances
2024 Final, Melbourne 2026 1/2 final, Ceska Lipa 2025 1/2 final, Pardubice 2025 1/4 final, Melbourne 2026 1/4 final, Pszczyna 2025 3rd round, New York 2025 2nd round, Ostrava 2025 2nd round, Monastir 2026 2nd round, Klosters 2025 2nd round, Ceska Lipa 2024 2nd round, Trnava 2025 2nd round, Wimbledon Junior 2024 2nd round, Wimbledon Junior 
