Dušan Lajović is a Serbian professional tennis player. Lajović has won two singles and two doubles titles on the ATP Tour. On 29 April 2019, Lajović reached his career-high singles ranking of world No. 23. On 21 September 2020, he peaked at No. 82 in the doubles rankings. He is best known for his clay-court game, kick serve and strong flowing groundstrokes, especially his one-handed backhand. Lajović regularly represents Serbia in team competitions, after playing in the now defunct World Team Cup in 2010 and 2011, he is a member of the Serbian Davis Cup team since 2012 and he contributed greatly to Serbia winning the inaugural ATP Cup in 2020, as he won four of six matches. He won his first singles tournament at the 2019 Croatia Open and reached his first Masters 1000 final at the 2019 Monte-Carlo Masters.