Bert St. John
Cecil Bertram Vernon St John was an Australian tennis player.
St. John won the doubles title alongside Pat O'Hara Wood at the Australasian Championships, the future Australian Open, in 1923, and reached three more finals at the tournament, losing in singles to Pat O'Hara Wood in 1923, in doubles alongside Gordon Lowe in 1915, and in mixed doubles alongside Margaret Molesworth in 1923.
He is the only player to have reached a major tournament final, in singles or doubles, with only one hand.
Grand Slam finals
Singles (1 runner-up)
| Outcome | Year | Championship | Opponent in final | Score in final |
| Runner-up | 1923 | Australasian Championships |  Pat O'Hara Wood | 1–6, 1–6, 3–6 |
Doubles (1 title, 1 runner-up)
| Outcome | Year | Championship | Partner | Opponents in final | Score in final |
| Runner-up | 1915 | Australasian Championships | Gordon Lowe | Clarence Todd Horace Rice | 6–8, 4–6, 9–7, 3–6 |
| Winner | 1923 | Australasian Championships | Pat O'Hara Wood | Dudley Bullough Horace Rice | 6–4, 6–3, 3–6, 6–0 |
Mixed doubles (1 runner-up)
| Outcome | Year | Championship | Partner | Opponents in final | Score in final |
| Runner-up | 1923 | Australasian Championships | Margaret Molesworth | Sylvia Lance Harper Horace Rice | 6–2, 4–6, 4–6 |