Stadium: Center Court Round: 28 Ground: Hardcourt indoor
| ATP Sofia MD | 2021/09/30 14:55 | Demoliner/Matos v Marach O / Oswald P | 6-7,6-7 |
| ATP Sofia MD | 2021/09/28 11:00 | Bopanna R / Qureshi A v Marach O / Oswald P | 2-6,7-6,7-10 |
| ATP Metz MD | 2021/09/22 13:20 | Marach O / Oswald P v Hurkacz/Zielinski | 3-6,4-6 |
| ATP Metz MD | 2021/09/21 13:40 | Marach O / Oswald P v 마헛 니 / 포스피실 바 | 6-4,6-3 |
| US Open MD | 2021/09/03 15:00 | Marach O / Oswald P v Erlich/Harris | 2-6,7-6,2-6 |
| ATP Winston-Salem MD | 2021/08/26 19:00 | Arevalo/Middelkoop v Marach O / Oswald P | 6-3,6-3 |
| ATP Winston-Salem MD | 2021/08/23 20:40 | Marach O / Oswald P v 길 S / 블리에겐 J | 7-6,5-7,10-4 |
| ATP Toronto MD | 2021/08/11 21:50 | Krawietz/Tecau v Marach O / Oswald P | 6-2,1-6,12-10 |
| ATP Sofia MD | 2021/10/01 09:00 | Gonzalez M / Molteni A v 브리킥 T / 카시크 N | 6-7,6-2,10-4 |
| ATP Sofia MD | 2021/09/30 11:50 | Gonzalez M / Molteni A v Milushev/Shandarov | 6-3,6-4 |
| ATP Nur-Sultan MD | 2021/09/26 06:00 | Gonzalez M / Molteni A v Erlich J / Vasilevski A | 6-1,6-2 |
| ATP Nur-Sultan MD | 2021/09/25 06:00 | Gonzalez M / Molteni A v Berankis/Sitak | 6-4,6-0 |
| ATP Nur-Sultan MD | 2021/09/24 06:00 | Gonzalez M / Molteni A v Glasspool/Heliovaara | 5-7,6-4,10-8 |
| ATP Nur-Sultan MD | 2021/09/22 16:05 | Gonzalez M / Molteni A v Popko/Skatov | 6-4,6-7,10-6 |
| Challenger Szczecin MD | 2021/09/18 17:00 | Gonzalez M / Molteni A v 고란손 안 / 라몬스 나 | 2-6,6-2,15-13 |
| Challenger Szczecin MD | 2021/09/17 14:40 | Gonzalez M / Molteni A v 제바비 로 / 콜라르 즈 | 6-2,7-5 |