Carles ("Carlos") Costa Masferrer (born 22 April 1968, in Barcelona, Spain) is a former professional tennis player from Spain. He was among the game's leading clay court players in the early 1990s.
Costa turned professional in 1988. Costa was runner-up at the 1992 Italian Open, and reached the fourth round at that year's French Open and US Open. In May 1992, he reached his career-high singles ranking of World No. 10.