René Lacoste (rənā´ läkôst´), 1905–96, French tennis player. He won the French singles championship (1925, 1927, and 1929), the British singles championship (1925, 1928), and the U.S. singles championship (1926, 1927). He was a member of the French team that won the Davis cup in 1927 and 1928. He wrote Lacoste on Tennis (1928). Among his inventions were the metal tennis racquet and his trademark "alligator" logo polo shirt.