Cassis challenger · ATP
Cassis challenger 2021
ChallengerHardCassis, France5 September – 12 September 2021Prize money: 44,820 EUR43 matchesAltitude: 15 mCourt: Medium-fast
Champion Benjamin Bonzi · Final: 7-6(7) 6-4
Final rounds
| Final | Benjamin Bonzi vs Lucas Pouille | 7-6(4) 6-4 |
| Semifinal | Benjamin Bonzi vs Kacper Zuk | 6-3 6-4 |
| Semifinal | Lucas Pouille vs Liam Broady | 6-4 6-3 |
| Quarterfinal | Kacper Zuk vs Thanasi Kokkinakis | 6-4 7-6(3) |
| Quarterfinal | Benjamin Bonzi vs Luca Van Assche | 6-3 3-6 6-2 |
| Quarterfinal | Lucas Pouille vs Clement Chidekh | 7-6(1) 6-4 |
| Quarterfinal | Liam Broady vs Ramkumar Ramanathan | 7-6(7) 6-4 |
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