By surface
| Surface | Hietala | Stephen Zeilen |
|---|---|---|
| Hard | 1 | 1 |
All meetings (2)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2017-01-16 | WTA | Australian Open | Round of 64 | Hard | Alison Riske Amritraj | 6-77 | 6-4 | 1-6 | ||
| 2016-10-03 | WTA | Beijing | Round of 32 | Hard | Shuai Zhang | 3-6 | 6-4 | 6-74 |