Carlos Costa Carles ("Carlos") Costa Masferrer (born April 22, 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. He won his first top-level singles title in March 1992 at Estoril. His second came just a month later in Barcelona. Costa was also 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.
1993 saw Costa win two more titles at Hilversum and Buenos Aires, and again reach the French Open fourth round.
Costa won another two singles titles in 1994, at Estoril and San Marino.
During his career, Costa won six top-level singles titles and five doubles titles. His career prize-money totalled US$3,134,189. Costa retired from the professional tour in 1999.
Currently Costa works for IMG and is the agent for Rafael Nadal. On April 23 he played in the Merrill Lynch Tour of Champions event in Barcelona and lost to Sergi Bruguera in the final.