Swedish sportsman Jan-Ove Waldner is often referred to as the 'Mozart' of what sport?

Jan-Ove Waldner (born 3 October 1965) is a Swedish former table tennis player. He is often referred to as "the Mozart of table tennis," and is widely regarded as being one of the greatest table tennis player of all time. A sporting legend in his native Sweden as well as in China, he is known in China as "Old Waldner" or "Evergreen Tree", because of his extraordinary longevity and competitiveness.

He is one of only five male players in the history of table tennis to achieve a career grand slam (World Champion and World Cup winner in singles, Olympic gold medal in singles) (in 1992). The others are: Liu Guoliang, China (in 1999), Kong Linghui, China (in 2000), Zhang Jike, China (in 2012), and Ma Long, China (in 2016).

As of 2015, Waldner has been playing international elite level table tennis for more than thirty years, which is somewhat unusual in the table tennis world given that hand–eye coordination and quick reactions are essential. Some young Chinese players whom he has recently played against were trained by those he played against in the 1990s, who were in turn trained by others he played in the 1980s.