Marcelo Rios advanced past Mariano Zabaleta via walkover in the CHI vs ARG round robin. Marcelo Rios extended the head-to-head to 3–1.
Rios M. advanced on a walkover.
Rios M. and Zabaleta M. faced 4 of the same opponents in the last 12 months. Rios M. went 2–2 (50%) against them, Zabaleta M. 3–3 (50%). Results against comparable opponents are close (1 : 1 better-results split).
Only 4 common opponents — small sample, treat as indicative.
Hard: Zabaleta M. leads 1–0 · Clay: Rios M. leads 2–0
Marcelo Rios advanced when Mariano Zabaleta withdrew. Umpiry, "Marcelo Rios vs Mariano Zabaleta — CHI vs ARG Round Robin", https://umpiry.com/match/2000-04-07/rios-vs-zabaleta-chi-vs-arg-rr?utm_source=cite (as of 7 April 2000).