01/By surface
each with its own count, at equal weight
Hard
1-0
J.L. leads 1-0 in 1 meeting on hard
Clay
1-0
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, J.L. first |
|---|---|---|---|---|---|---|
| Aug 28, 2025 | US OpenGrand Slam, best of 5 | hard | 2nd round | Struff J.L. | 7-6, 2-6, 6-3, 4-6, 7-5 | 144 v 11 |
| Apr 20, 2024 | BMW OpenATP250 | clay | semifinal | Struff J.L. | 6-2, 6-0 | 28 v 12 |
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. Struff J.L. and Rune H. each carry the table against every opponent faced.