

Learner Tien defeated Frances Tiafoe 7-6 3-6 7-5 in the Delray Beach quarter-final on hard. The result followed the form book — Learner Tien came in ranked #15, defending last year's round of 16. Learner Tien claimed a first win over Frances Tiafoe in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-08-28 | US Open | R128 | hard | Frances Tiafoe | 6-2 7-5 6-1 |
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 (18 vs 24). ATP, WTA & Challenger.
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.