Thomas Karl Johan Enqvist (born 13 March 1974) is a Swedish tennis coach and a former professional player. He reached the final of the 1999 Australian Open and won a total of 19 singles titles, including three Masters titles. He has a career high ATP world singles ranking of No. 4, achieved on 15 November 1999.
Throughout his career, Enqvist finished four seasons ranked inside the top 10 and won at least one ATP title for six consecutive years. In 1998 he underwent surgery in Stockholm to remove a small piece of bone from his right foot and had surgery on his right shoulder to repair a repetitive strain injury. Despite his surgeries, Enqvist posted some major victories, including wins over world no. 1 Pete Sampras, Juan Carlos Ferrero, and Andy Roddick.
Enqvist won a total of 19 singles titles, the most significant being ATP Masters Series titles at Paris (1996), Stuttgart (1999) and both the singles and doubles titles in Cincinnati (2000). In winning the Stuttgart Masters, he defeated four top 10 players, including world no. 1 Andre Agassi.
His best showing at a Grand Slam event was at the 1999 Australian Open, when he beat Jan-Michael Gambill, Byron Black, Pat Rafter, Mark Philippoussis, Marc Rosset and Nicolás Lapentti before he was "outsmarted" in the final, losing in four sets to Yevgeny Kafelnikov of Russia. He also reached the quarterfinals at the 1996 Australian Open and at Wimbledon in 2001.
Enqvist was a force on the Swedish Davis Cup team. In 1998, he helped Sweden reach the finals of the Davis Cup for the fourth time in five years.
Enqvist currently works as a commentator for Eurosport Sweden. He is also the current vice-captain for Team Europe in the Laver Cup, a position he has held since the inaugural tournament.
From 2017 to 2019, Enqvist was captain of the Sweden Davis Cup team. Starting in February 2022, he briefly coached Stefanos Tsitsipas, in a trial period during the Rotterdam Open and the Sunshine Double.
Since March 2026, he is coaching Matteo Berrettini.