Lorenzo Manta (born 16 September 1974 in Winterthur) is a former tennis player from Switzerland, who turned professional in 1992.

His best achievement in the grand slam tournaments was reaching the fourth round at Wimbledon in 1999.

There, he had a big upset win over the 1996 Wimbledon champion, Richard Krajicek, in the third round in five sets.

Manta was then defeated by Brazil's Gustavo Kuerten in the fourth round.

Both his father Leonardo and his sister Joana also played tennis professionally.