Oeiras 4 challenger 2021 (Portugal)
(31,440 €, clay, men)
| Start | Round | S | 1 | 2 | 3 | 4 | 5 | H | A | ||
| 29.05. 12:05 |
F | De Jong / Van Rijth | 2 | 6 | 7 | 1.95 | 1.72 | info | |||
| Lenz / Quiroz | 0 | 1 | 63 | ||||||||
| 28.05. 19:10 |
SF | De Jong / Van Rijth | 2 | 6 | 6 | 1.65 | 2.10 | info | |||
| Cachin / Ugo Carab | 0 | 4 | 4 | ||||||||
| 28.05. 18:25 |
SF | Lenz / Quiroz | 2 | 7 | 6 | 2.18 | 1.61 | info | |||
| Borges / Cabral | 0 | 65 | 2 | ||||||||
| 27.05. 19:10 |
QF | Lenz / Quiroz | 2 | 7 | 5 | 11 | 1.29 | 3.19 | info | ||
| Araujo / Coelho | 1 | 5 | 7 | 9 | |||||||
| 27.05. 17:55 |
QF | Borges / Cabral | 2 | 6 | 6 | 1.55 | 2.31 | info | |||
| Bonadio / Serdarusi | 0 | 2 | 2 | ||||||||
| 27.05. 17:45 |
QF | Cachin / Ugo Carab | 2 | 4 | 6 | 10 | 2.30 | 1.56 | info | ||
| King / Oliveira (1) | 1 | 6 | 1 | 7 | |||||||
| 26.05. 17:00 |
QF | De Jong / Van Rijth | 2 | 4 | 6 | 12 | 2.23 | 1.58 | info | ||
| Brown / Weissborn (3) | 1 | 6 | 1 | 10 | |||||||
| 26.05. 19:10 |
R16 | King / Oliveira (1) | 2 | 5 | 7 | 10 | 1.40 | 3.01 | info | ||
| Ortega-Ol / Yevseyev | 1 | 7 | 66 | 7 | |||||||
| 26.05. 16:15 |
R16 | Lenz / Quiroz | 2 | 2 | 7 | 10 | 2.29 | 1.55 | info | ||
| Doumbia / Reboul (2) | 1 | 6 | 65 | 3 | |||||||
| 26.05. 15:40 |
R16 | Cachin / Ugo Carab | 2 | 6 | 6 | 2.11 | 1.64 | info | |||
| Bortolott / Galovic | 0 | 3 | 2 | ||||||||
| 26.05. 14:40 |
R16 | Borges / Cabral | 2 | 7 | 66 | 11 | 1.87 | 1.84 | info | ||
| Drzewieck / Martos Go (4) | 1 | 64 | 7 | 9 | |||||||
| 26.05. 13:50 |
R16 | Araujo / Coelho | 2 | 4 | 6 | 10 | 4.10 | 1.20 | info | ||
| Cerretani / Cornea | 1 | 6 | 4 | 4 | |||||||
| 26.05. 12:10 |
R16 | Bonadio / Serdarusi | 2 | 6 | 3 | 11 | 1.35 | 2.96 | info | ||
| Falcao / Faria | 1 | 3 | 6 | 9 | |||||||
| 25.05. 17:45 |
R16 | De Jong / Van Rijth | 2 | 6 | 6 | 1.72 | 2.04 | info | |||
| Tseng / Wu | 0 | 2 | 1 | ||||||||
| 25.05. 17:35 |
R16 | Brown / Weissborn (3) | 2 | 6 | 6 | 1.56 | 2.25 | info | |||
| Galdos / Zeballos | 0 | 4 | 1 |

round of 16
King / Oliveira [1]
Falcao / Faria [WC]
Borges / Cabral [WC]
Araujo / Coelho [WC]
Doumbia / Reboul [2]
quarterfinal
King / Oliveira [1]
Borges / Cabral [WC]
Araujo / Coelho [WC]
semifinal
Borges / Cabral [WC]
final
- Tournament details
| Round | Prize money | Ranking points |
| round of 16 | 200 € | 0 |
| quarterfinal | 350 € | 7 |
| semifinal | 600 € | 15 |
| final | 1,000 € | 30 |
| winner | 1,700 € | 50 |
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| UTR Pro Tennis Series 5 | 4 | |||
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