Michael Chang defeated Jan Siemerink 6-3 6-2 in the Hong Kong quarter-final on hard. Michael Chang extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-03-08 | Indian Wells Masters | R64 | hard | Jan Siemerink | 7-5 6-3 |
| 1991-05-27 | Roland Garros | R128 | clay | Michael Chang | 6-2 6-0 6-3 |
Averages over each player's completed matches in the selected window (200 vs 199). 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