Chris Haggard defeated Donnie Isaak 6-7 6-1 6-4 in the Central Africa Masters 4 round of 16 on hard. The upset overturned the form book — Donnie Isaak came in leading the head-to-head 1–0, but Chris Haggard had been the form player, winning 2 of their last 4 on hard. Chris Haggard claimed a first win over Donnie Isaak in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-06-11 | USA 3 Masters 3 | R16 | hard | Donnie Isaak | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.