Marcos Giron defeated John Millman 6-4 6-2 in the Sofia quarter-final on hard. The result followed the form book — Marcos Giron came in leading the head-to-head 1–0. Marcos Giron extended the head-to-head to 2–0.
Giron M. took it in straight sets.
Giron M. and Millman J. faced 5 of the same opponents in the last 12 months. Giron M. went 1–4 (20%) against them, Millman J. 1–4 (20%). Results against comparable opponents are close (0 : 1 better-results split).
Marcos Giron beat John Millman 6-4 6-2. Umpiry, "Marcos Giron vs John Millman — Sofia Quarter-final", https://umpiry.com/match/2021-09-27/giron-vs-millman-sofia-qf?utm_source=cite (as of 27 September 2021).