E. Mertens and N. Bartunkova are level 1-1 in their head-to-head since 2018 over 2 matches.
| Surface | E. Mertens | N. Bartunkova |
|---|---|---|
| Grass | 0 | 1 |
| Hard | 1 | 0 |
| Date | Winner | Score | Event |
|---|---|---|---|
| June 17, 2026 | N. Bartunkova | 2 - 0 | Berlin · 1/8-finals · grass |
| Jan. 24, 2026 | E. Mertens | 2 - 0 | WTA Australian Open · 1/16-finals · hard |