Severin Lüthi, born in Bern on 5 January 1976, is a tennis coach and former Swiss tennis player. He coaches Roger Federer and the Swiss Davis Cup team.
His best finish in singles corresponds to the 622nd world position, reached on October 23, 1995.

Better in the doubles, in which, on November 25, 1996, the Swiss reached the 448th world position. Coach of the Swiss Davis Cup team since 2005, he has been Roger Federer's coach since 2007.

Lüthi grew up in Stettlen, on the outskirts of Bern. He played tennis in his youth and once beat Gustavo Kuerten. He gave up tennis at the age of 20 and served a commercial apprenticeship with his father's company.