Frederick Sydney Stolle, AO[4] (8 October 1938 – 5 March 2025)[5][6] was an Australian amateur world No. 1 tennis player and commentator. He was born in Hornsby, New South Wales, Australia. He was the father of former Australian Davis Cup player Sandon Stolle.

Stolle is notable for being the only male player in history to have lost his first five Grand Slam singles finals, all but one were to Roy Emerson, the fifth of which he led by two sets to love. However, Stolle went on to win two Grand Slam tournament singles titles, the 1965 French Championships and the 1966 US Championships.[7] At Wimbledon and the Australian Championships he finished as runner-up in these tournaments and losing to compatriot Roy Emerson on no fewer than five occasions. World Tennis magazine ranked Stolle world No. 1 amateur in 1966.[8]

Stolle won ten Grand Slam doubles titles, partnering with compatriots Bob Hewitt (4 titles), Roy Emerson (4 titles), and Ken Rosewall (2 titles). In addition Stolle won 7 Grand Slam mixed doubles titles.

As a member of the Australian Davis Cup team Stolle won the Davis Cup title in 1964,[9] 1965 and 1966.[10] In 1964 Stolle and Emerson were briefly suspended from the Australian Davis Cup team for going on an overseas tour in defiance of a Lawn Tennis Association of Australia order to remain in Australia until April.[11]

Stolle turned professional in 1966,[1] and as a professional, won two singles and 13 doubles titles. He earned about US$500,000 in career prize money.[12]

Stolle coached Vitas Gerulaitis from 1977 until 1983.

For many years, Stolle did TV commentary for ESPN and other tennis broadcasts. He provided commentary on Grand Slam tennis tournaments for Australia's Fox Sports and the Nine Network.