Woong Sun Jun defeated David Martin 6-3 6-2 in the Japan F2 semi-final on carpet. The upset overturned the form book — David Martin came in leading the head-to-head 1–0. Woong Sun Jun claimed a first win over David Martin in two meetings, levelling the head-to-head at 1–1.
Sun Jun W. took it in straight sets.
Carpet: Sun Jun W. leads 1–0 · Hard: Martin D. leads 1–0
Woong Sun Jun beat David Martin 6-3 6-2. Umpiry, "Woong Sun Jun vs David Martin — Japan F2 Semi-final", https://umpiry.com/match/2006-04-17/jun-vs-martin-japan-f2-sf?utm_source=cite (as of 17 April 2006).