01/By surface
each with its own count, at equal weight
Hard
0-1
J.L. leads 1-0 in 1 meeting on hard
Clay
0-1
J.L. leads 1-0 in 1 meeting on clay
Grass
Never on grass
no meeting on this surface
02/Every meeting
2 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, U. first |
|---|---|---|---|---|---|---|
| Apr 28, 2024 | Mutua Madrid OpenMasters 1000 | clay | 3rd round | Struff J.L. | 7-5, 6-4 | 14 v 24 |
| Sep 29, 2022 | Sofia OpenATP250 | hard | 2nd round | Struff J.L. | 6-3, 6-1 | 110 v 132 |
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. Humbert U. and Struff J.L. each carry the table against every opponent faced.