Trevor Kronemann defeated Andrew Kratzmann 6-2 6-3 in the Australia 1 Masters 4 round of 16 on carpet. The upset overturned the form book — Andrew Kratzmann came in leading the head-to-head 1–0. Trevor Kronemann claimed a first win over Andrew Kratzmann in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-02-10 | Australia 1 Masters 1 | QF | carpet | Andrew Kratzmann | 6-4 6-3 |