| Country (sports) |  Australia |
|---|---|
| Born | 6 July 1932 |
| Plays | Right-handed |
| Singles | |
| Grand Slam singles results | |
| Australian Open | 2R (1966) |
| French Open | 1R (1956, 1960) |
| Wimbledon | 4R (1956) |
| Doubles | |
| Grand Slam doubles results | |
| Australian Open | QF (1959) |
| Last updated on: 18 December 2014. | |
John O'Brien (born 6 July 1932) is an Australian tennis player active during the 1950s and 1960s. O'Brien was also one of the 18 hostages in the 2014 Sydney hostage crisis.[1]
- ^ Perry, Nick (18 December 2014). "Sydney siege: The moment hostage John O'Brien saw a green button and decided to make a run for it". The Sydney Morning Herald. Retrieved 18 December 2014.