Porto challenger · ATP
Porto challenger 2021
ChallengerHardPorto, Portugal27 June – 4 July 2021Prize money: 44,820 EUR43 matchesAltitude: 87 mCourt: Medium-slow
Champion Altug Celikbilek · Final: 7-5 6-3
Final rounds
| Final | Altug Celikbilek vs Quentin Halys | 6-2 6-1 |
| Semifinal | Quentin Halys vs Emilio Gomez | 6-4 6-4 |
| Semifinal | Altug Celikbilek vs Sergiy Stakhovsky | 6-2 6-1 |
| Quarterfinal | Emilio Gomez vs Gastao Elias | 6-3 7-6(4) |
| Quarterfinal | Sergiy Stakhovsky vs Gonzalo Oliveira | 7-6(2) 7-6(5) |
| Quarterfinal | Quentin Halys vs Steven Diez | 6-3 6-0 |
| Quarterfinal | Altug Celikbilek vs Tatsuma Ito | 7-5 6-3 |
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