Matheson Klein defeated Isaac Frost 6-4 6-1 in the Australia F3 round of 16 on clay. The upset overturned the form book — Isaac Frost came in leading the head-to-head 1–0. Matheson Klein claimed a first win over Isaac Frost in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-09-15 | Australia F6 | R32 | hard | Isaac Frost | 7-6(5) 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.