Gianluca Mager defeated Dennis Novak 6-3 6-1 in the Guadalajara CH qualifying round 1 on hard. The upset overturned the form book — Dennis Novak came in ranked #818, leading the head-to-head 2–1. Gianluca Mager narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-10-25 | Vienna | R32 | hard | Dennis Novak | 7-6(4) 7-6(4) |
| 2021-07-26 | Kitzbuhel | R32 | clay | Gianluca Mager | 6-4 6-0 |
| 2019-10-14 | Stockholm | Q2 | hard | Dennis Novak | 6-1 7-5 |
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 (200 vs 200). ATP, WTA & Challenger.