By surface
| Surface | Mark Smith | Youhei Tsuji |
|---|---|---|
| Hard | 3 | 1 |
All meetings (4)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2019-10-14 | WTA | Moscow | Quarterfinal | Hard | Belinda Bencic | 6-78 | 1-6 | |||
| 2018-10-15 | WTA | Luxembourg | Round of 16 | Hard | Belinda Bencic | 1-6 | 3-6 | |||
| 2017-10-09 | WTA | Linz | Round of 32 | Hard | Belinda Bencic | 6-4 | 2-6 | 6-77 | ||
| 2016-08-22 | WTA | New Haven | Round of 32 | Hard | Kirsten Flipkens | 1-6 | 6-4 | 5-7 |