Kei Nishikori defeated Mackenzie Mcdonald 7-6 6-3 6-7 2-6 6-3 in the US Open round of 64 on hard. The upset overturned the form book — Mackenzie Mcdonald came in ranked #140, leading the head-to-head 2–0, defending last year's round of 128. Kei Nishikori claimed a first win over Mackenzie Mcdonald in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-02-10 | Delray Beach | R32 | hard | Mackenzie Mcdonald | 7-6(4) 4-6 7-5 |
| 2021-08-02 | Washington | SF | hard | Mackenzie Mcdonald | 6-4 3-6 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
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 (116 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Mcdonald M.: 5 days rest · 1 match, 16 games (7d). Higher means fresher. About