Guillermo Vilas is a retired professional tennis player from Argentina. Although he peaked at world no. 2 on the ATP rankings in 1977, several sources and publications ranked Vilas as the world no. 1 that year. Vilas was the second Latin-American to win a Grand Slam tournament and is considered one of the greatest South American tennis players ever. He was the second male player to win more than 900 matches in the Open Era, reaching the mark in July 1987, behind only Jimmy Connors who reached 900 in 1985. Ivan Lendl and Roger Federer have also surpassed 900 wins. 

August 17th, 1952 in Mar del Plata (Age 72)