Jimmy Arias defeated Jaime Yzaga 6-1 6-3 in the New Haven round of 64 on hard. The upset overturned the form book — Jaime Yzaga came in leading the head-to-head 1–0, but Jimmy Arias had been the form player, winning 3 of their last 7 on hard. Jimmy Arias claimed a first win over Jaime Yzaga in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-01-14 | Australian Open | R32 | hard | Jaime Yzaga | 3-6 7-6(6) 6-1 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.