Which organization did not officially recognize Vilas as No. 1?
ATP
ITF
WTA
USTA
Answer
ATP, the governing body of professional tennis, did not officially recognize Guillermo Vilas as the world's No. 1 player during his peak in the late 1970s. This was due to the ATP's ranking system, which was based on a player's performance over a 12-month period, rather than a rolling average like the system used by other organizations.
Guillermo Vilas Trivia: How Much Do You Know About Guillermo Vilas?
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