Tetsuya Chaen defeated Oh Hee Kwon 6-1 5-7 7-6 in the Japan F4 round of 32 on hard. The upset overturned the form book — Oh Hee Kwon came in leading the head-to-head 9–2. Tetsuya Chaen narrowed the head-to-head to 9–3.
Chaen T. came through in three sets.
Hard: Kwon O. leads 4–2 · Clay: Kwon O. leads 2–1 · Carpet: Kwon O. leads 3–0
Tetsuya Chaen beat Oh Hee Kwon 6-1 5-7 7-6(3). Umpiry, "Tetsuya Chaen vs Oh Hee Kwon — Japan F4 Round of 32", https://umpiry.com/match/2007-04-09/chaen-vs-kwon-japan-f4-r32?utm_source=cite (as of 9 April 2007).