Lester Cook defeated Izak Van Der Merwe 6-2 1-6 6-3 in the Thailand F1 qualifying round on hard. The upset overturned the form book — Izak Van Der Merwe came in leading the head-to-head 1–0, but Lester Cook had been the form player, winning 3 of their last 5 on hard. Lester Cook claimed a first win over Izak Van Der Merwe in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-03-20 | Canada F3 | R16 | hard | Izak Van Der Merwe | 6-1 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.