| Country (sports) |  West Germany |
|---|---|
| Born | 2 May 1964 Hamburg, West Germany |
| Height | 1.85 m (6 ft 1 in) |
| Plays | Right-handed |
| Singles | |
| Career record | 60–79 |
| Career titles | 1 |
| Highest ranking | No. 58 (19 October 1987) |
| Grand Slam singles results | |
| Australian Open | 2R (1985) |
| French Open | 4R (1987) |
| Wimbledon | 2R (1986, 1987, 1988) |
| US Open | 2R (1986, 1987, 1988) |
| Doubles | |
| Career record | 45–67 |
| Career titles | 3 |
| Highest ranking | No. 67 (24 April 1989) |
| Grand Slam doubles results | |
| Australian Open | 2R (1990) |
| French Open | 3R (1988) |
| Wimbledon | 2R (1988) |
Ricki Osterthun (born 2 May 1964) is a former tennis player from West Germany, who won one single title (1985, Hilversum) during his professional career.
The right-hander reached his highest singles ATP-ranking on 19 October 1987, when Osterhun became the number 58 of the world.