Rexy Ronald Mainaky (born March 9, 1968 in Ternate) is a former men's doubles badminton world champion from Indonesia who is often simply known as Rexy. He won the men doubles Olympic gold medal in 1996 with Ricky Subagja.
At present, he is the head coach of Philippines, employed by the Philippine Badminton Association. Prior to this, he was the men's doubles coach of Malaysia, and also has coached for England. Rexy is known amongst his peers and colleagues, and the game's fans, as one of the greatest doubles player of all time, alongside players such as Park Joo Bong, Kim Dong Moon, Tony Gunawan, Christian Hadinata, Tjun Tjun and Finn Kobbero. He is regarded as one of the best coaches in the world, alongside former player Park Joo Bong of Korea (currently head coach of Japanese badminton squad). Rexy's boyish charm and ethic of working hard whilst having as much fun as possible sparks great results wherever he goes. He is a truly unique asset to the world of badminton, and noted for his charity work through badminton, by playing in exhibitions across Asia and Europe post-competitive career.