| | Year | Tournament | Position |
|
First Name:
|
Gregorio
|
|
Last Name:
|
de Leo
|
|
Hometown:
|
|
|
St/Prov:
|
|
|
Country:
|
ITA
|
|
Rank:
|
93
|
| 2020 | Castelconturbia Trophy (ITA) | Champion |
| 2020 | Italian Open Eneos (Challenge Tour) | T46 |
| 2020 | Toscana Alps Open (Alps Tour) | T24 |
| 2020 | Cervino Alps Open (Alps Tour) | T6 |
| 2020 | British Amateur | 32s |
| 2020 | Italian Stroke Amateur | 2nd |
| 2020 | Italian National Open | T7 |
| 2020 | Monticello Grand Prix (ITA) | 6th |
| 2020 | Barras Memorial (SUI) | T14 |
| 2020 | Portuguese International Am | T11 |
| 2020 | Octagonal (Europe) | 7/0/0 |
| 2019 | Baleares Cup (ESP) | T4 |
| 2019 | Castelconturbia Trophy (ITA) | 2nd |
| 2019 | Glauco Lolli Ghetti Trophy | Champion |
| 2019 | Piacenza City Trophy (ITA) | 2nd |
| 2019 | Italian Team Qualifying | Medalist |
| 2019 | Nazionale Open (Alps Tour) | T16 |
| 2019 | Monticello Grand Prix (ITA) | T2 |
| 2019 | Italian Stroke Amateur | T10 |
| 2019 | Italian Match Amateur | Semi's |