Ze Zhang defeated Denis Istomin 3-6 7-5 2-6 6-1 6-4 in the Davis Cup G1 R2: CHN vs UZB round robin on clay. The upset overturned the form book — Denis Istomin came in leading the head-to-head 2–1. Ze Zhang narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-10-05 | Beijing | R32 | hard | Ze Zhang | 6-3 1-6 6-3 |
| 2014-04-04 | Davis Cup G1 R2: CHN vs UZB | RR | clay | Denis Istomin | 6-4 4-6 3-6 6-3 6-4 |
| 2010-03-05 | Davis Cup G1 R1: CHN vs UZB | RR | hard | Denis Istomin | 4-6 7-5 6-2 7-5 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (177 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About