Claire Liu defeated Katerina Siniakova 0-6 6-3 6-1 in the Adelaide 1 qualifying round 2 on hard. The upset overturned the form book — Katerina Siniakova came in ranked #34. Claire Liu extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-03-20 | Miami | R128 | hard | Claire Liu | 3-6 3-3 RET |
| 2022-10-03 | Monastir | R16 | hard | Claire Liu | 7-5 6-2 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About
Averages over each player's completed matches in the selected window (138 vs 176). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Liu C.: 1 day rest · 3 matches, 54 games (7d) · Siniakova K.: 13 days rest · 1 match (14d). Higher means fresher. About