Collin Altamirano defeated Alex Rybakov 3-6 6-3 6-4 in the M25 Los Angeles 1 round of 16 on hard. The upset overturned the form book — Alex Rybakov came in ranked #475, leading the head-to-head 2–1. Collin Altamirano narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-10-08 | M25 Louisville 1 | R32 | hard | Alex Rybakov | 6-1 6-2 |
| 2024-02-21 | M25 Naples 1 | R32 | clay | Alex Rybakov | 6-3 6-2 |
| 2018-01-08 | USA F2 | QF | hard | Collin Altamirano | 6-2 1-6 6-2 |
Averages over each player's completed matches in the selected window (19 vs 178). 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