By surface
| Surface | Alex Castellanos Munuera | Mark Smith |
|---|---|---|
| Hard | 2 | 2 |
All meetings (4)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025-10-27 | WTA | Hong Kong | Round of 32 | Hard | Belinda Bencic | 3-6 | 4-6 | |||
| 2023-09-11 | WTA | San Diego | Round of 32 | Hard | Aliaksandra Sasnovich | 3-6 | 6-3 | 2-6 | ||
| 2022-03-21 | WTA | Miami | Round of 16 | Hard | Belinda Bencic | 2-6 | 3-6 | |||
| 2018-08-27 | WTA | US Open | Round of 128 | Hard | Aliaksandra Sasnovich | 6-2 | 1-6 | 2-6 |