Thomas Karl Johan Enqvist (born 13 March 1974) is a Swedish former professional tennis player.

Throughout his career, Enqvist finished four seasons ranked inside the top 10 and won at least one ATP title for six consecutive years.

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 losing in the final to Yevgeny Kafelnikov of Russia.

In 1998, he helped Sweden reach the finals of the Davis Cup for the fourth time in five years.

Enqvist is also the current vice-captain for Team Europe in the Laver Cup, a position he has held since the inaugural tournament.