Jiri Kosler defeated Sean Thornley 6-2 6-1 in the South Africa F1 round of 16 on hard. The upset overturned the form book — Sean Thornley came in leading the head-to-head 1–0. Jiri Kosler claimed a first win over Sean Thornley in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-11-01 | Greece F4 | QF | hard | Sean Thornley | 3-6 6-0 6-2 |