

Ann Li advanced to the quarterfinals of the Monterrey tournament with a walkover against Maria Timofeeva in the Round of 16. Timofeeva withdrew before the match, giving Li the win without a contest.
Averages over each player's completed matches in the selected window (41 vs 34). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Slight edge · Li A. narrowly ahead
Calibrated model · 65% favourite accuracy (2025–26, out-of-sample). Probability is a statistical estimate, not a certainty. How it works.
The Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.
Timofeeva M.: 3 days rest · 3 matches, 81 games (7d) · Li A.: played today · 3 matches, 55 games (7d). Higher means fresher. About
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