Miles Armstrong defeated Jun Chao Xu 6-3 6-2 in the Australia F12 round of 32 on grass. The upset overturned the form book — Jun Chao Xu came in leading the head-to-head 2–0. Miles Armstrong claimed a first win over Jun Chao Xu in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-03-09 | New Zealand F1 | R16 | hard | Jun Chao Xu | 5-7 6-4 6-2 |
| 2008-04-28 | Korea Rep F1 | R32 | hard | Jun Chao Xu | 3-6 6-4 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.