Thomas Johansson, Swedish-Monacan tennis player
Karl Thomas Conny Johansson (pronounced [ˈtʊ̌mːas ˈjûːanˌsɔn]; born 24 March 1975) is a Swedish retired professional tennis player and coach. He reached a career-high Association of Tennis Professionals (ATP) world No. 7 singles ranking on 10 May 2002. His career highlights in singles include a Grand Slam title at the Australian Open in 2002, and an ATP Masters Series title at the 1999 Canada Masters. He also won a silver medal at the 2008 Summer Olympics in men's doubles, partnering Simon Aspelin.

As of July 2021, Johansson remains the last Swedish man to win a major in singles.

He was the coach of David Goffin until late 2020.