01/By surface
each with its own count, at equal weight
Hard
1-1
Level 1-1 in 2 meetings on hard
Clay
2-0
E. leads 2-0 in 2 meetings on clay
Grass
Never on grass
no meeting on this surface
02/Every meeting
4 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, E. first |
|---|---|---|---|---|---|---|
| Sep 14, 2020 | Internazionali BNL d'ItaliaPremier | clay | 1st round | Mertens E. | 6-3, 6-1 | 20 v 62 |
| Sep 18, 2019 | Toray Pan Pacific Open Tennis TournamentPremier | hard | 2nd round | Mertens E. | 6-3, 1-6, 6-2 | 24 v 33 |
| Oct 12, 2018 | Tianjin OpenInternational | hard | quarterfinal | Hsieh S.W.ret. | 6-2, 4-0 | 15 v 30 |
| May 4, 2018 | Grand Prix SAR Lalla MeryemInternational | clay | semifinal | Mertens E. | 6-0, 6-2 | 19 v 60 |
A record, never a share of meetings. Main-draw singles since 2013; a meeting ended by retirement is counted with the sets that were played and marked; a walkover is listed and counted in neither column. Mertens E. and Hsieh S.W. each carry the table against every opponent faced.