Stadium: Grand Stand Round: 26 Ground: Clay
| ATP Barcelona MD | 2021/04/17 15:50 | Gille/Vliegen v Mannarino/Paire | 4-6,4-6 |
| ATP Monte Carlo MD | 2021/04/13 14:35 | Gille/Vliegen v Evans/Skupski | 6-7,6-3,8-10 |
| ATP Marbella MD | 2021/04/05 14:50 | Gille/Vliegen v Marrero/Menendez-Maceiras | 6-4,6-7,8-10 |
| ATP Miami MD | 2021/03/25 20:30 | Auger Aliassime/Hurkacz v Gille/Vliegen | 6-4,6-3 |
| ATP Rotterdam MD | 2021/03/03 16:10 | Gille/Vliegen v Tsitsipas/Tsitsipas | 2-6,3-6 |
| ATP Singapore MD | 2021/02/28 05:00 | Gille/Vliegen v Ebden/Smith | 6-2,6-3 |
| ATP Singapore MD | 2021/02/26 04:00 | Gille/Vliegen v Bambridge/Inglot | 6-4,6-4 |
| ATP Singapore MD | 2021/02/25 04:00 | Gille/Vliegen v Raja/Ramanathan | 6-4,7-6 |