| | Year | Tournament | Position |
|
First Name:
|
Mateo
|
|
Last Name:
|
Fernandez de O
|
|
Hometown:
|
Beccar
|
|
St/Prov:
|
|
|
Country:
|
ARG
|
|
Rank:
|
51
|
| 2020 | Azalea Invitational (SC, USA) | Champion |
| 2020 | US Amateur | 16's |
| 2020 | Southern Amateur (USA) | T21 |
| 2020 | Wyoming Desert Intercollegiate (CA, USA) | T6 |
| 2020 | Amer Ari Invitational (HI, USA) | T18 |
| 2020 | Latin America Amateur | T19 |
| 2020 | South American Amateur | 2nd |
| 2019 | South American Team | 12/1/1 |
| 2019 | Hartford Hawk Invitational (CT, USA) | T14 |
| 2019 | Carmel Cup (CA, USA) | T17 |
| 2019 | Argentina Rank Final | Champion |
| 2019 | North Open (Argentina Tour) | 8th |
| 2019 | Central Open Amateur (ARG) | Champion |
| 2019 | Norpatagonico Open (ARG) | Champion |
| 2019 | Argentina Amateur | Finalist |
| 2019 | Argentina Am - medal | T4 |
| 2019 | South Open (Argentina Tour) | T20 |
| 2019 | South American Amateur | T13 |