Helge Koll defeated Barry Cowan 6-4 6-4 in the Switzerland 2 Masters 4 qualifying round on carpet. The upset overturned the form book — Barry Cowan came in leading the head-to-head 1–0. Helge Koll claimed a first win over Barry Cowan in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1998-02-25 | Germany F1 | R32 | carpet | Barry Cowan | 6-1 6-2 |
Averages over each player's completed matches in the selected window (1 vs 22). 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. Small sample — read as indicative. About