Marc Sieber defeated Peter Heller 6-4 6-1 in the Portugal F1 round of 16 on hard. The upset overturned the form book — Peter Heller came in leading the head-to-head 1–0. Marc Sieber claimed a first win over Peter Heller in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-05-04 | Turkey F18 | R16 | hard | Peter Heller | 7-5 6-3 |
Averages over each player's completed matches in the selected window (141 vs 200). 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