[121] Mackenzie McDonald 7-6,2-6,4-6 Leonardo Mayer [160] 2021-05-05 10:00
Stadium: Center Court Round: 26 Ground: Clay
Home History
| Challenger Biella | 2021/05/04 10:20 | Mackenzie McDonald v Juan Manuel Cerundolo | 3-6,6-4,6-3 |
| ATP Monachium | 2021/04/28 14:00 | Ilya Ivashka v Mackenzie McDonald | 6-7,6-1,6-2 |
| ATP Monachium | 2021/04/27 09:00 | Mackenzie McDonald v Dusan Lajovic | 6-4,6-4 |
| ATP Monachium | 2021/04/25 09:00 | Andrej Martin v Mackenzie McDonald | 3-6,2-6 |
| ATP Monachium | 2021/04/24 09:00 | Peter Gojowczyk v Mackenzie McDonald | 1-6,2-6 |
| Challenger Orlando | 2021/04/13 14:00 | Christian Harrison v Mackenzie McDonald | 7-5,6-3 |
| ATP Miami | 2021/03/27 01:05 | Mackenzie McDonald v John Isner | 6-2,3-6,5-7 |
| ATP Miami | 2021/03/24 21:30 | Vasek Pospisil v Mackenzie McDonald | 3-6,6-4,3-6 |
Away History
| Challenger Biella | 2021/05/04 13:55 | Luca Vanni v Leonardo Mayer | 6-7,0-6 |
| ATP Santiago | 2021/03/08 15:30 | Pedro Sousa v Leonardo Mayer | 6-2,6-4 |
| ATP Buenos Aires | 2021/02/27 20:00 | Ernesto Escobedo v Leonardo Mayer | 7-5,7-6 |
| ATP Cordoba | 2021/02/20 17:20 | Leonardo Mayer v Tomas Martin Etcheverry | 6-7,7-6,3-6 |
| Challenger Antalya | 2021/02/05 11:50 | Tomas Martin Etcheverry v Leonardo Mayer | 6-3,6-4 |
| Challenger Antalya | 2021/02/03 12:30 | Akira Santillan v Leonardo Mayer | 6-7,2-6 |
| Challenger Antalya | 2021/02/02 09:50 | Leonardo Mayer v Lorenzo Musetti | 6-4,6-3 |
| Challenger Antalya | 2021/01/28 13:00 | Leonardo Mayer v Cem Ilkel | 5-7,1-6 |