Guillermo Vilas has had a dominant career, posting 951–297 across 1248 matches (76.2% — exceptional). Few players in the Open Era have sustained that level of dominance across a full career. With 62 titles, among the most prolific champions in the Open Era: Masters, Buenos Aires, Gstaad, Hilversum and 40 more.
At Grand Slam level (Australian Open, Roland Garros, Wimbledon, US Open): Guillermo Vilas has been outstanding at the Slams — 139–45 (75.5%) across 184 matches. Winning more than 7 in 10 Grand Slam matches is the benchmark of an all-time great.
103 finals reached — won 62, lost 41 (solid 60% conversion) — consistently getting to finals and winning the majority is a hallmark of elite performers. 153 semifinals. 190 quarterfinals.
vs. Top 10: 57–89 (39.0%, 146 matches). Top 10 opponents have represented a clear ceiling; addressing that deficit is the single biggest lever for improving the overall record.
By format — best-of-five: 227–93 (70.9%); best-of-three: 724–203 (78.1%). Slightly stronger in three-set contests, though the five-set record is still respectable.
Historic season: 1977 — 136–14 (90.7%) from 150 matches. A campaign of 136 wins in a single season is among the finest single-season records the Open Era has seen — the clearest benchmark of what is achievable at peak level.
Guillermo Vilas assembled a historic 46-match winning streak — one of the longest in the Open Era. Sustaining that level across so many matches demands physical and mental consistency that very few players have matched.