Lisa Whybourn defeated Sung Hee Han 6-3 6-3 in the Tsukuba 25K round of 32 on hard. The upset overturned the form book — Sung Hee Han came in leading the head-to-head 1–0, but Lisa Whybourn had been the form player, winning 2 of their last 4 on hard. Lisa Whybourn claimed a first win over Sung Hee Han in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-05-13 | Balikpapan 25K | R32 | hard | Sung Hee Han | 6-1 6-4 |
Averages over each player's completed matches in the selected window (4 vs 4). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About