01/By surface
each with its own count, at equal weight
Hard
Never on hard
no meeting on this surface
Clay
3-0
I. leads 3-0 in 3 meetings on clay
Grass
Never on grass
no meeting on this surface
02/Every meeting
3 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, I. first |
|---|---|---|---|---|---|---|
| Apr 15, 2026 | Porsche Tennis Grand PrixWTA500 | clay | 2nd round | Swiatek I. | 6-2, 6-3 | 4 v 51 |
| Jul 30, 2023 | Poland OpenWTA250 | clay | final | Swiatek I. | 6-0, 6-1 | 1 v 153 |
| May 1, 2021 | Mutua Madrid OpenWTA1000 | clay | 2nd round | Swiatek I. | 6-3, 6-3 | 17 v 59 |
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. Swiatek I. and Siegemund L. each carry the table against every opponent faced.