San Marino challenger · ATP
San Marino challenger 2021
ChallengerClaySan Marino, San Marino8 August – 15 August 2021Prize money: 66,640 EUR43 matchesAltitude: 673 mCourt: Fast
Champion Holger Rune · Final: 6-0 7-5
Final rounds
| Final | Holger Rune vs Orlando Luz | 1-6 6-2 6-3 |
| Semifinal | Orlando Luz vs Hugo Dellien | 6-4 6-2 |
| Semifinal | Holger Rune vs Marco Cecchinato | 7-5 7-6(4) |
| Quarterfinal | Orlando Luz vs Maxime Janvier | 7-6(7) 7-5 |
| Quarterfinal | Marco Cecchinato vs Pavel Kotov | 7-6(5) 6-3 |
| Quarterfinal | Hugo Dellien vs Felipe Meligeni Rodrigues Alves | 6-3 6-2 |
| Quarterfinal | Holger Rune vs Joao Menezes | 6-0 7-5 |
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