Tetsuya Chaen defeated Yuichi Sugita 6-2 6-4 in the Tokyo qualifying round of 16 on hard. The upset overturned the form book — Yuichi Sugita came in leading the head-to-head 2–0. Tetsuya Chaen claimed a first win over Yuichi Sugita in three meetings, narrowing the head-to-head to 2–1.
Chaen T. took it in straight sets.
Tetsuya Chaen beat Yuichi Sugita 6-2 6-4. Umpiry, "Tetsuya Chaen vs Yuichi Sugita — Tokyo Qualifying Round of 16", https://umpiry.com/match/2006-10-02/chaen-vs-sugita-tokyo-q16?utm_source=cite (as of 2 October 2006).