John Flavelle (1863–1947) was a British tennis player with a long career.

According to A. Wallis Myers, John Flavelle travelled all over the world playing and watching tennis (which was unusual in that era).

Of Flavelle's style of play, A. Wallis Myers (in his book Lawn Tennis At Home and Abroad in 1903) said "He is essentially a baseline player and, volleying only on the rarest of occasions and with a somewhat indifferent service, relies almost entirely on a low forehand drive on which he gets a lot of top."

[3] Flavelle reached the Wimbledon last 16 in 1906 (beating George Simond before losing to Sydney Smith).

In his last appearance aged 57 in 1920, Flavelle lost easily in round one to Bill Johnston.