Conversation so far:
What was the greatest match ever for Pancho Gonzales?
The match with Pasarell has been called one of The Ten Greatest Matches of the Open Era.
How long did Pancho Gonzales's match against Pasarell last?
5-hour, 12-minute

Question: Who was his opponent?
Self-contained rewrite: Who was Pancho Gonzales's opponent in his match against Pasarell?