19.09.21 | | Sander Gille/Joran Vliegen | Boris Arias/Federico Zeballos | 6-3, 6-4 | | match details | Davis Cup | Clay |
06.06.21 | 3rd round | Pablo Andujar/Pedro Martinez Portero | Sander Gille/Joran Vliegen | 6-4, 7-66 | | match details | Paris | Clay |
04.06.21 | 2nd round | Sander Gille/Joran Vliegen | Austin Krajicek/Tennys Sandgren | 6-4, 6-1 | | match details |
02.06.21 | 1st round | Sander Gille/Joran Vliegen | Lorenzo Sonego/Andrea Vavassori | 6-4, 6-4 | | match details |
27.05.21 | 1/4 | Roman Jebavy/Aleksandr Nedovyesov | Sander Gille/Joran Vliegen | Sander Gille/Joran Vliegen - walk over | | match details | Parma | Clay |
26.05.21 | 1st round | Sander Gille/Joran Vliegen | Francesco Passaro/Stefano Travaglia | 7-65, 6-4 | | match details |
12.05.21 | 1st round | Rajeev Ram/Joe Salisbury | Sander Gille/Joran Vliegen | 6-3, 2-6, 12-10 | | match details | Rome | Clay |
08.05.21 | 1/2 | Nikola Mektic/Mate Pavic | Sander Gille/Joran Vliegen | 6-4, 6-2 | | match details | Madrid | Clay |
07.05.21 | 1/4 | Sander Gille/Joran Vliegen | Ivan Dodig/Filip Polasek | 6-3, 3-6, 10-5 | | match details |
06.05.21 | 2nd round | Sander Gille/Joran Vliegen | Alexander Bublik/Cristian Garin | Alexander Bublik/Cristian Garin - walk over | | match details |
04.05.21 | 1st round | Sander Gille/Joran Vliegen | Marton Fucsovics/Casper Ruud | 6-3, 6-4 | | match details |
02.05.21 | fin | Wesley Koolhof/Kevin Krawietz | Sander Gille/Joran Vliegen | 4-6, 6-4, 10-5 | | match details | Munich | Clay |
30.04.21 | 1/2 | Sander Gille/Joran Vliegen | Dustin Brown/Peter Gojowczyk | 6-3, 6-72, 13-11 | | match details |
28.04.21 | 1/4 | Sander Gille/Joran Vliegen | Federico Coria/Guido Pella | Federico Coria/Guido Pella - walk over | | match details |
27.04.21 | 1st round | Sander Gille/Joran Vliegen | Jonathan Erlich/Divij Sharan | 6-3, 6-2 | | match details |
13.04.21 | 1st round | Daniel Evans/Neal Skupski | Sander Gille/Joran Vliegen | 7-65, 3-6, 10-8 | | match details | Monte-Carlo | Clay |
05.04.21 | 1st round | David Marrero/Adrian Menendez-Maceiras | Sander Gille/Joran Vliegen | 4-6, 7-65, 10-8 | | match details | Marbella | Clay |