Guillermo Perez-Roldan of Argentina is a former right-handed player who competed on the ATP tour from 1986 to 1996. He won 9 tour-level singles titles, from a career match record of 241–137 (63.8%). His strongest surface by win rate was clay, where he went 234–120 (66%). His best three-year stretch came in 1988–1990, and he reached a peak Elo rating of 2131. His most frequent opponent was Thomas Muster, whom he faced 13 times with a record of 3–10.
Titles include Slams, Masters, Tour Finals, 500s, 250s, legacy tour events and Olympic gold; Davis Cup is excluded, and walkovers are excluded from all win–loss records. GOAT points value every round reached, scaled per tier (Slam title 2000 anchor; ranking includes Slam champions only, but every player's points are shown here). Elo is a chess-style rating over the full match history (K = 250/(n+5)^0.4); the timeline shows pre-match ratings, sampled. The gold band on the season chart marks the best three-consecutive-year window.