Khumoun Sultanov defeated Mert Alkaya in the quarterfinals of the Astana tournament, winning 7-6, 6-3 on hard courts. Sultanov hit one ace and one double fault, winning 79 percent of his first serves and converting 33 percent of break points. Alkaya hit five aces and two double faults, winning 70 percent of his first serves and converting 50 percent of break points.
No previous meetings on record.
Averages over each player's completed matches in the selected window (18 vs 19). ATP, WTA & Challenger.
Slight edge · Sultanov K. narrowly ahead
Calibrated model · 63% favourite accuracy (2025–26, out-of-sample). Probability is a statistical estimate, not a certainty. How it works.
The Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.
Sultanov K.: 4 days rest · 3 matches, 72 games (7d) · Alkaya M.: 5 days rest · 2 matches, 41 games (7d). Higher means fresher. About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About