Alexander Sarkissian defeated Frederik Nielsen 6-4 7-5 in the Tiburon CH qualifying round 1 on hard. The upset overturned the form book — Frederik Nielsen came in leading the head-to-head 1–0, but Alexander Sarkissian had been the form player, winning 6 of their last 10 on hard. Alexander Sarkissian claimed a first win over Frederik Nielsen in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-01-12 | USA F4 | SF | hard | Frederik Nielsen | 3-6 6-4 6-3 |
Averages over each player's completed matches in the selected window (120 vs 40). 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