Clinton Thomson defeated Alexander Flock 4-6 6-3 6-4 in the Croatia F1 round of 16 on clay. The upset overturned the form book — Alexander Flock came in leading the head-to-head 3–0. Clinton Thomson claimed a first win over Alexander Flock in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2010-08-23 | Netherlands F5 | QF | clay | Alexander Flock | 6-2 4-6 7-6(3) |
| 2008-06-23 | Netherlands F3 | QF | clay | Alexander Flock | 7-6(4) 6-2 |
| 2008-06-09 | Germany F6 | R32 | clay | Alexander Flock | 6-4 3-6 6-3 |