Tolentino represented his native country at the 1984 Summer Olympics in Los Angeles, where he was defeated in the first round by the United States' Eric Amend. The right-hander reached his highest singles ATP-ranking on 31 August 1987, when he became world No. 437. Tolentino participated in Davis Cup ties for the Philippines from 1984–1987, posting a 4-5 record in singles.
Manny Tolentino now lives in the Bay Area in California and is married to his wife, Rosario. He has three kids who are Camille, Carmina, and Noah.