# 2022 Open de Oeiras III – Singles

Gastão Elias was the three-time defending champion but chose not to defend his title.
Kaichi Uchida won the title after defeating Kimmer Coppejans 6–2, 6–4 in the final.

## Seeds

* Roberto Carballés Baena (first round)
* Facundo Bagnis (semifinals)
* Nicolás Jarry (semifinals)
* Daniel Dutra da Silva (first round)
* Evgeny Karlovskiy (first round)
* Kaichi Uchida (champion)
* Johan Nikles (second round)
* Laurent Lokoli (first round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| | Kimmer Coppejans | 7$^{11}$ | 4 | 7$^7$ | | | | |
| 3 | Nicolás Jarry | 6$^9$ | 6 | 6$^5$ | | | | |
| 3 | Nicolás Jarry | 6$^9$ | 6 | 6$^5$ | | Kimmer Coppejans | 2 | 4 |
| | | | | | 6 | Kaichi Uchida | 6 | 6 |
| 6 | Kaichi Uchida | 7 | 7$^7$ | | 6 | Kaichi Uchida | 6 | 6 |
| 2 | Facundo Bagnis | 5 | 6$^4$ | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | R Carballés Baena | 4 | 5 | | | | | | | | | | | | | | | |
| | K Coppejans | 6 | 7 | | | K Coppejans | 7 | 6 | | | | | | | | | | |
| | S Diez | 2 | 6 | 6 | | S Diez | 5 | 1 | | | | | | | | | | |
| | S Fanselow | 6 | 1 | 4 | | | | | | K Coppejans | 5 | 7$^7$ | 6 | | | | | |
| | B Hassan | 4 | 4 | | | | | | | D Michalski | 7 | 6$^2$ | 3 | | | | | |
| | D Michalski | 6 | 6 | | | D Michalski | 6 | 6 | | | | | | | | | | |
| WC | Pedro Araújo | 3 | 7 | 7 | WC | P Araújo | 3 | 3 | | | | | | | | | | |
| 8 | L Lokoli | 6 | 5 | 5 | | | | | | | | | | | K Coppejans | 7$^{11}$ | 4 | 7$^7$ |
| 3 | N Jarry | 6 | 6 | | | | | | | | | | | 3 | N Jarry | 6$^9$ | 6 | 6$^5$ |
| | Eduard Esteve Lobato | 4 | 4 | | 3 | N Jarry | 6 | 6 | | | | | | | | | | |
| | G Oliveira | 6 | 5 | 6 | | G Oliveira | 3 | 3 | | | | | | | | | | |
| Q | T Bellucci | 4 | 7 | 1 | | | | | 3 | N Jarry | 7$^9$ | 4 | 7$^8$ | | | | | |
| | O Roca Batalla | 4 | 4 | | | | | | Alt | K Jacquet | 6$^7$ | 6 | 6$^6$ | | | | | |
| Q | Oscar José Gutierrez | 6 | 6 | | Q | OJ Gutierrez | 4 | 3 | | | | | | | | | | |
| Alt | K Jacquet | 6 | 6 | | Alt | K Jacquet | 6 | 6 | | | | | | | | | | |
| 5 | E Karlovskiy | 3 | 4 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | K Uchida | 6 | 6 | | | | | | | | | | | | | | | |
| | L Wessels | 4 | 1 | | 6 | K Uchida | 6 | 0 | | | | | | | | | | |
| WC | T Cação | 7$^9$ | 2 | 4 | | T Kamke | 3 | 0$^r$ | | | | | | | | | | |
| | T Kamke | 6$^7$ | 6 | 6 | | | | | | 6 | K Uchida | 4 | 6 | 6 | | | | |
| | C Gimeno Valero | 6$^4$ | 6 | 5 | | | | | | | M Geerts | 6 | 1 | 4 | | | | |
| WC | J Domingues | 7$^7$ | 4 | 7 | WC | J Domingues | 1 | 4 | | | | | | | | | | |
| | M Geerts | 6 | 6 | | | M Geerts | 6 | 6 | | | | | | | | | | |
| 4 | D Dutra da Silva | 2 | 4 | | | | | | | | | | | | 6 | K Uchida | 7 | 7$^7$ |
| 7 | J Nikles | 4 | 6 | 6 | | | | | | | | | | | 2 | F Bagnis | 5 | 6$^4$ |
| | E Kırkın | 6 | 3 | 0 | 7 | J Nikles | 6 | 4 | 3 | | | | | | | | | |
| Q | A Rybakov | 6 | 7 | | Q | A Rybakov | 4 | 6 | 6 | | | | | | | | | |
| Q | P Boscardin Dias | 3 | 5 | | | | | | | Q | A Rybakov | 4 | 6 | 3 | | | | |
| Q | A Lazarov | 6 | 2 | 4 | | | | | | 2 | F Bagnis | 6 | 2 | 6 | | | | |
| | N Sánchez Izquierdo | 2 | 6 | 6 | | N Sánchez Izquierdo | 4 | 2 | | | | | | | | | | |
| Q | Lucas Gerch | 6 | 6$^3$ | 3 | 2 | F Bagnis | 6 | 6 | | | | | | | | | | |
| 2 | F Bagnis | 3 | 7$^7$ | 6 | | | | | | | | | | | | | | |