Antalya 4 challenger · ATP
Antalya 4 challenger 2021
ChallengerClayAntalya, Türkiye5 December – 12 December 2021Prize money: 31,440 EUR43 matchesAltitude: 65 mCourt: Slow
Champion Evgenii Tiurnev · Final: 7-6(0) 6-2
Final rounds
| Final | Evgenii Tiurnev vs Oleg Prihodko | 3-6 6-4 6-4 |
| Semifinal | Oleg Prihodko vs Giovanni Fonio | 1-6 6-1 6-3 |
| Semifinal | Evgenii Tiurnev vs Nerman Fatic | 6-2 5-7 4-1 ret. |
| Quarterfinal | Nerman Fatic vs Duje Ajdukovic | 6-4 7-5 |
| Quarterfinal | Evgenii Tiurnev vs Alexandar Lazarov | 6-4 6-7(5) 6-1 |
| Quarterfinal | Oleg Prihodko vs Cem Ilkel | 6-3 3-6 6-2 |
| Quarterfinal | Giovanni Fonio vs Nick Hardt | 7-6(0) 6-2 |
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