Club Kampioenschap Single 2021
| zo 20/6 | HEB2 | R van Vliet | 1 | - | N Connor | 0 | 6-1, 7-6 | |
| HEB4 | A de Jong | 1 | - | S Omer | 0 | 6-0, 6-2 | ||
| HEB4 | R Hoogwout | 1 | - | D'Angelo Verginie | 0 | 6-0, 6-2 | ||
| HEB3 | T van Elk | 1 | - | J Koomen | 0 | 6-3, 6-7, 7-6 | ||
| HEB3 | C Kok | 1 | - | H Brillemans | 0 | 6-2, 6-0 | ||
| DEB1 | J Clein | 1 | - | P Laan | 0 | 6-2, 6-0 | ||
| DEB2 | S Witkamp | 1 | - | M Douwens | 0 | 6-3, 6-1 | ||
| HEA1 | R Hommes | 1 | - | J Jansen | 0 | 6-0, 6-0 | ||
| HEA2 | J Boekhoudt | 1 | - | T Moraal | 0 | 5-7, 6-2, 6-2 | ||
| HEC2 | H Lips | 1 | - | M Hagen | 0 | 6-3, 7-6 | ||
| HEC1 | R van Vliet | 1 | - | E Nonnekes | 0 | 6-1, 6-3 | ||
| HEC1 | J Bouman | 1 | - | J Ligthart | 0 | 6-0, 6-2 | ||
| ma 21/6 | DEB2 | N Huijgen | 1 | - | S Witkamp | 0 | 6-3, 6-2 | |
| HEC1 | J Bouman | 1 | - | E Nonnekes | 0 | 6-1, 6-0 | ||
| di 22/6 | HEB2 | R van Vliet | 1 | - | K de Jong | 0 | 6-4, 6-4 | |
| HEB4 | F Ysebaert | 1 | - | S Omer | 0 | 6-0, 6-3 | ||
| HEB1 | W de Ruijter | 1 | - | A van den Beukel | 0 | w.o. | ||
| DEB1 | P Laan | 1 | - | J Griffith | 0 | 6-0, 6-0 | ||
| DEB1 | J Clein | 1 | - | E Stubbe | 0 | 6-4, 6-1 | ||
| HEA1 | L Verdaasdonk | 1 | - | A Post | 0 | 2-3 opgegeven | ||
| HEA2 | T Moraal | 1 | - | M Kuijpers | 0 | 7-5, 6-3 | ||
| HEC2 | J de Groot | 1 | - | M Hagen | 0 | 6-2, 3-6, 6-2 | ||
| HEC1 | R van Vliet | 1 | - | J Ligthart | 0 | 6-0, 6-3 | ||
| wo 23/6 | HEB2 | N Connor | 1 | - | K de Jong | 0 | 6-1, 6-7, 6-0 | |
| HEB2 | P van Metelen | 1 | - | R van Vliet | 0 | 6-2, 6-0 | ||
| HEB3 | M Uilen | 1 | - | H Brillemans | 0 | 6-0, 6-0 | ||
| DEB2 | L Stuger | 1 | - | S Witkamp | 0 | 6-4, 6-4 | ||
| DEB2 | N Huijgen | 1 | - | M Douwens | 0 | 6-2, 6-0 | ||
| HEA2 | G van Vliet | 1 | - | T Moraal | 0 | 6-3, 6-4 | ||
| HEC2 | J de Groot | 1 | - | P Goos | 0 | 6-0, 6-0 | ||
| HEC1 | R van Vliet | 1 | - | J Bouman | 0 | 4-6, 7-5, 7-6 | ||
| do 24/6 | HEB2 | R van Vliet | 1 | - | L Schrijvers | 0 | 6-3, 6-4 | |
| HEB4 | F Ysebaert | 1 | - | D'Angelo Verginie | 0 | 6-1, 6-2 | ||
| HEB1 | W de Ruijter | 1 | - | J Salentijn | 0 | 7-5, 6-2 | ||
| HEB3 | M Uilen | 1 | - | J Koomen | 0 | 6-1, 6-1 | ||
| HEC2 | J de Groot | 1 | - | H Lips | 0 | 6-2, 6-3 | ||
| HEC1 | J Ligthart | 1 | - | E Nonnekes | 0 | 6-4, 6-3 | ||
| vr 25/6 | DEB1 | J Clein | 1 | - | J Griffith | 0 | 6-0, 6-0 | |
| DEB1 | E Stubbe | 1 | - | Y Wigleven | 0 | 2-6, 6-4, 7-6 | ||
| HEA1 | L Warren | 1 | - | A Post | 0 | w.o. | ||
| za 26/6 | HEB2 | P van Metelen | 1 | - | L Schrijvers | 0 | 6-3, 6-2 | |
| HEB4 | R Hoogwout | 1 | - | A de Jong | 0 | 6-4, 5-7, 7-5 | ||
| DEB2 | L Stuger | 1 | - | L de Vrijer | 0 | 6-0, 6-0 | ||
| HEA1 | J Jansen | 1 | - | A Post | 0 | w.o. | ||
| HEA2 | T Schellekens | 1 | - | M Kuijpers | 0 | 6-2, 7-5 |
