Denis Zivkovic defeated Lester Cook 4-6 6-3 6-4 in the USA F25 round of 32 on hard. The upset overturned the form book — Lester Cook came in leading the head-to-head 1–0. Denis Zivkovic claimed a first win over Lester Cook in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-09-18 | USA F23 | R16 | hard | Lester Cook | 6-2 5-7 6-4 |