Career
Born in Argentina, the left-hander reached his highest Association of Tennis Professionals singles ranking of World Number. 56 in July 1991. Masso"s greatest result in singles was reaching the final of Hilversum in 1990 as a qualifier, beating celebrated claycourters Juan Aguilera, Sergi Bruguera and Emilio Sanchez en route. He lost this final being a qualifier and losing against a lucky loser: Francisco Clavet
Masso became a naturalised citizen of Belgium after marrying a Belgian wife and taking up residence in Brussels
Singles (1 runner-up).