C. Naef leads the head-to-head 3-1 since 2018 against E. Seidel, over 4 matches.
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By surface
| Surface | E. Seidel | C. Naef |
| Hard | 0 | 2 |
| Clay | 1 | 1 |
Current ELO by surface
| Surface | E. Seidel | C. Naef |
| Hard |
1598 (72-53) |
1674 (103-42) |
| Clay |
1539 (72-63) |
1456 (29-31) |
| Grass |
1540 (9-11) |
1697 (23-14) |
ELO is computed per surface from results since 2018; the win-loss pair is that surface's record.
Match history
| Date | Winner | Score | Event |
| Feb. 28, 2025 | C. Naef | 2 - 1 | W75 Trnava · Quarter-finals · hard |
| Jan. 26, 2025 | E. Seidel | 2 - 0 | Linz · Semi-finals · clay |
| Feb. 22, 2024 | C. Naef | 2 - 0 | ITF W75 Porto Women · 1/8-finals · hard |
| May 30, 2022 | C. Naef | 2 - 1 | French Open · 1/32-finals · clay |
Recent form
E. Seidel — 1-4 in the last 5
C. Naef — 3-2 in the last 5
| Date | | Opponent | Score | Event |
| June 23, 2026 |
L |
J. Garland |
1 - 2 |
Wimbledon · Quarter-finals · grass |
| June 14, 2026 |
L |
A. Krueger |
2 - 0 |
Ilkley · Final · grass |
| June 13, 2026 |
W |
M. Stoiana |
1 - 2 |
Ilkley · Semi-finals · grass |
| June 12, 2026 |
W |
H. Tan |
2 - 0 |
Ilkley · Quarter-finals · grass |
| June 12, 2026 |
W |
A. Urhobo |
2 - 0 |
Ilkley · 1/8-finals · grass |
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