Novak Djokovic
He won the ATP Tour Finals in 2008, 2012, 2013, 2014, 2015 and 2022, and helped Serbia win the Davis Cup in 2010. He won a bronze medal at the 2008 Summer Olympics. He has won a record 39 Masters 1000 series titles, and a single season record six Masters 1000 titles in 2015.