| | Year | Tournament | Position |
|
First Name:
|
Mateo
|
|
Last Name:
|
Fernandez de O
|
|
Hometown:
|
Beccar
|
|
St/Prov:
|
|
|
Country:
|
ARG
|
|
Rank:
|
55
|
| 2021 | Carmel Cup (CA, USA) | T3 |
| 2021 | US Amateur | 32's |
| 2021 | US Am - Stroke | T37 |
| 2021 | Western Am - Stroke (USA) | T17 |
| 2021 | Southern Amateur (USA) | T41 |
| 2021 | US Amateur Qualifying (3 spots) | 3rd |
| 2021 | Maridoe Am - stroke (TX, USA) | 13th |
| 2021 | NCAA D1 Florida Regional (USA) | T23 |
| 2021 | Big 12 (collegiate, USA) | 9th |
| 2021 | Thunderbird Collegiate (AZ, USA) | T13 |
| 2021 | Wyoming Cowboy Classic (AZ, USA) | T24 |
| 2021 | Hannon Collegiate (TX, USA) | T28 |
| 2021 | Trinity Forest Invitational (TX, USA) | 6th |
| 2021 | Jones Cup (GA, USA) | T19 |
| 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 |