C. Liu and L. Sun are level 1-1 in their head-to-head since 2018 over 2 matches.
| Surface | C. Liu | L. Sun |
|---|---|---|
| Clay | 1 | 0 |
| Hard | 0 | 1 |
| Date | Winner | Score | Event |
|---|---|---|---|
| May 22, 2026 | C. Liu | 2 - 0 | French Open · Final · clay |
| Oct. 25, 2025 | L. Sun | 2 - 0 | Guangzhou · Semi-finals · hard |