Horacio Zeballos defeated Ryan Harrison 6-1 4-6 6-4 in the Tokyo round of 32 on hard. The result followed the form book — Horacio Zeballos came in leading the head-to-head 2–0. Horacio Zeballos extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2016-03-21 | Miami Masters | Q1 | hard | Horacio Zeballos | 6-7(4) 6-3 6-4 |
| 2011-04-04 | Houston | R32 | clay | Horacio Zeballos | 6-4 6-3 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.