Thomas Högstedt (born 21 September 1963) is a former professional tennis player from Sweden. He is currently the coach of Maria Sharapova.
Högstedt was the junior singles winner at the 1981 US Open, defeating West German player Hans Schwaier in the final.
The following year he had a win over rising star Mats Wilander at Cincinnati and was a semi-finalist at Basle and Båstad.
He won his only Grand Prix tournament at Ferrera in 1983, without dropping a set. That year he also reached the quarter-finals in Milan.
In both 1987 and 1988, Högstedt has some success at New York's OTB Open, with semi-final appearances.
Högstedt had the best win of his Grand Slam career at the 1989 Wimbledon Championships, defeating sixth seed Jakob Hlasek in the opening round. He also reached the quarter-finals of a tournament in Rio de Janeiro and the Australian Indoor Championships.
In 1990 he appeared in all four Grand Slams, for the first time in his career, but was unable to progress past the first round in any of them. His best performances on tour came at Rotterdam, Singapore and Tokyo, where he made quarter-finals. In Tokyo he defeated world 6 Andrés Gómez, the second time in their two meetings that he had got the better of the Ecuadorian, having also beaten him at Basel in 1982.
He was appointed coach of four time Grand Slam winner Maria Sharapova in late 2010, having previously had success coaching Tommy Haas and Li Na, who were both top 10 players under his tutelage.
Grand Prix career finals 
Singles: 1 (1–0) 
||Opponent in the final
||Score in the final
|| Ferrara, Italy
|| Butch Walts
Challenger titles 
Singles: (1)