Stadium: Court 2 Round: 26 Ground: Hardcourt indoor
| ATP Madrid MD | 2021/05/08 12:00 | Gille/Vliegen v Mektic/Pavic | 4-6,2-6 |
| ATP Murray River Open MD | 2021/02/06 01:40 | Mektic/Pavic v Gille/Vliegen | 7-6,3-6,10-6 |
| ATP Vienna MD | 2021/10/28 20:55 | Mektic/Pavic v Gille/Koepfer | 6-3,6-7,9-11 |
| ATP Vienna MD | 2021/10/25 12:00 | Mektic/Pavic v Puetz/Venus | 6-4,6-4 |
| ATP Indian Wells MD | 2021/10/14 04:05 | Mektic/Pavic v Peers/Polasek | 2-6,3-6 |
| ATP Indian Wells MD | 2021/10/12 23:30 | Mektic/Pavic v Arevalo/Middelkoop | 6-1,6-3 |
| ATP Indian Wells MD | 2021/10/11 01:00 | Mektic/Pavic v McDonald/Nakashima | 6-2,6-2 |
| US Open MD | 2021/09/02 20:30 | Mektic/Pavic v Lammons/Withrow | 2-6,5-7 |
| ATP Cincinnati MD | 2021/08/19 23:00 | Mektic/Pavic v Hurkacz/Sinner | 7-6,5-7,5-10 |
| ATP Toronto MD | 2021/08/15 17:30 | Mektic/Pavic v Ram/Salisbury | 3-6,6-4,3-10 |
| ATP Paris MD | 2021/11/02 18:10 | Gille/Vliegen v Bolelli/Gonzalez | 7-6,6-4 |
| ATP Antwerp MD | 2021/10/20 11:00 | Delbonis/Vega Hernandez v Gille/Vliegen | 5-7,6-4,11-9 |
| ATP Indian Wells MD | 2021/10/11 20:50 | Gille/Vliegen v Dodig/Melo | 4-6,6-4,5-10 |
| ATP Indian Wells MD | 2021/10/08 21:20 | Bautista-Agut/Davidovich Fokina v Gille/Vliegen | 6-4,3-6,9-11 |
| Davis Cup | 2021/09/19 15:00 | Arias/Zeballos v Gille/Vliegen | 3-6,4-6 |
| US Open MD | 2021/09/04 16:50 | Gille/Vliegen v O'Mara/Qureshi | 6-3,3-6,6-7 |
| US Open MD | 2021/09/03 17:00 | Gille/Vliegen v Ivashka/Munar | 6-3,6-3 |
| ATP Winston-Salem MD | 2021/08/23 20:40 | Marach/Oswald v Gille/Vliegen | 7-6,5-7,10-4 |