Tadic was born on November 20, 1988, in Bačka Topola, Yugoslavia. The attacker joined Ajax from English side, Southampton in 2018. On July 25, 2018, he made his debut for Ajax in a match against Sturm Graz (2-0) in the second qualifying round of the UEFA Champions League.
So far, he has played 149 official matches for Ajax's first team and scored 76 goals. Last season, the Ajax captain was named Dutch footballer of the year.
Director of football affairs Marc Overmars added: "It is no secret that Dusan plays a very important role for the team. Both on and off the pitch, he is a real leader. So, it’s fantastic that we can keep him at Ajax even longer. Dusan’s fitness is excellent and he will be of great value to Ajax in the coming years."