Five things to know about table tennis Olympic champ Ma Long

Ma Long is a three-time Olympic gold medallist, the reigning men's singles Olympic champion, and one of the best players the table tennis world has ever seen.

The 32-year-old, who could become the greatest table tennis Olympian ever at the Tokyo Games in 2021, is a global superstar of the sport, but away from the limelight prefers to keep a low profile.