G. Den Heijer is a ATP tennis player. Current hard-court ELO 1257 (15-21). Recent form: 3-12 over the last 15 matches.
| Date | | Opponent | Score | Event |
| Sept. 5, 2024 |
L |
P. Zahraj |
2 - 0 |
ITF M15 Haren Men · clay |
| Aug. 29, 2024 |
L |
E. Vanshelboim |
2 - 0 |
ITF M25 Oldenzaal Men · clay |
| Aug. 28, 2024 |
W |
D. Verbeek |
0 - 2 |
ITF M25 Oldenzaal Men · clay |
| Aug. 13, 2024 |
L |
R. Collignon |
2 - 0 |
ITF M25 Koksijde Men · clay |
| Aug. 6, 2024 |
L |
M. Mrva |
0 - 2 |
ITF M15 Eupen Men · clay |
| July 23, 2024 |
L |
I. Sevilla |
2 - 1 |
ITF M25 Denia Men · clay |
| July 9, 2024 |
L |
O. Crawford |
2 - 1 |
ITF M25 The Hague Men · clay |
| June 25, 2024 |
L |
A. Forger |
0 - 2 |
ITF M15 Alkmaar Men · clay |
| June 19, 2024 |
L |
P. Brunclik |
2 - 0 |
ITF M15 Saarlouis Men · clay |
| May 24, 2024 |
L |
E. Benchetrit |
2 - 0 |
ITF M15 Bucharest 3 Men · clay |
| May 23, 2024 |
W |
M. R. Marinescu |
2 - 1 |
ITF M15 Bucharest 3 Men · clay |
| May 22, 2024 |
W |
S. Konov |
0 - 2 |
ITF M15 Bucharest 3 Men · clay |
| April 24, 2024 |
L |
M. Lanz |
2 - 0 |
M15 Meerbusch · clay |
| April 3, 2024 |
L |
P. Verbin |
0 - 2 |
ITF M15 Antalya 9 Men · clay |
| March 14, 2024 |
L |
S. Fomin |
1 - 2 |
M15 Aktobe 2 · hard |