D. Collins leads the head-to-head 3-2 since 2018 against E. Mertens, over 5 matches.
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32 ATP & WTA matches analysed today
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By surface
| Surface | E. Mertens | D. Collins |
| Clay | 0 | 1 |
| Hard | 2 | 2 |
Current ELO by surface
| Surface | E. Mertens | D. Collins |
| Hard |
1840 (124-82) |
1780 (71-47) |
| Clay |
1759 (27-23) |
1861 (31-16) |
| Grass |
1816 (27-21) |
1669 (6-5) |
ELO is computed per surface from results since 2018; the win-loss pair is that surface's record.
Match history
| Date | Winner | Score | Event |
| April 5, 2024 | D. Collins | 2 - 0 | WTA Charleston · Quarter-finals · clay |
| Jan. 8, 2024 | E. Mertens | 2 - 0 | WTA Hobart · 1/16-finals · hard |
| Aug. 30, 2023 | E. Mertens | 2 - 1 | WTA US Open · 1/32-finals · hard |
| Feb. 14, 2023 | D. Collins | 2 - 0 | Doha · 1/16-finals · hard |
| Sept. 30, 2021 | D. Collins | 2 - 0 | Chicago 2 · 1/8-finals · hard |
Recent form
| Date | | Opponent | Score | Event |
| Aug. 26, 2025 |
L |
J. Cristian |
0 - 2 |
US Open · 1/64-finals · hard |
| Aug. 8, 2025 |
L |
T. Townsend |
0 - 2 |
Cincinnati · 1/64-finals · hard |
| July 30, 2025 |
L |
C. Gauff |
2 - 1 |
Montreal · 1/32-finals · hard |
| July 28, 2025 |
W |
V. Tomova |
2 - 0 |
Montreal · 1/64-finals · hard |
| July 22, 2025 |
L |
M. Linette |
2 - 0 |
Washington · 1/16-finals · hard |
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