Michael Chang defeated Roger Federer 7-5 6-2 in the Halle quarter-final on grass. The upset overturned the form book — Roger Federer came in leading the head-to-head 4–0. Michael Chang claimed a first win over Roger Federer in five meetings, narrowing the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-08-26 | US Open | R64 | hard | Roger Federer | 6-3 6-1 6-3 |
| 2002-01-14 | Australian Open | R128 | hard | Roger Federer | 6-4 6-4 6-3 |
| 2001-04-16 | Monte Carlo Masters | R64 | clay | Roger Federer | 6-4 6-3 |
| 2000-01-17 | Australian Open | R128 | hard | Roger Federer | 6-4 6-4 7-6(5) |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (140 vs 200). ATP, WTA & Challenger.