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.

Ricki Osterthun
Country (sports) West Germany
Born (1964-05-02) 2 May 1964 (age 60)
Hamburg, West Germany
Height1.85 m (6 ft 1 in)
PlaysRight-handed
Singles
Career record60–79
Career titles1
Highest rankingNo. 58 (19 October 1987)
Grand Slam singles results
Australian Open2R (1985)
French Open4R (1987)
Wimbledon2R (1986, 1987, 1988)
US Open2R (1986, 1987, 1988)
Doubles
Career record45–67
Career titles3
Highest rankingNo. 67 (24 April 1989)
Grand Slam doubles results
Australian Open2R (1990)
French Open3R (1988)
Wimbledon2R (1988)

The right-hander reached his highest singles ATP-ranking on 19 October 1987, when Osterhun became the number 58 of the world.

Career finals

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Singles (1 win, 2 losses)

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Result W–L Date Tournament Surface Opponent Score
Win 1–0 Jul 1985 Hilversum, Netherlands Clay   Kent Carlsson 4–6, 4–6, 6–2, 6–4, 6–3
Loss 1–1 May 1986 Munich, West Germany Clay   Emilio Sánchez 6–1, 6–3
Loss 1–2 Oct 1987 Toulouse, France Carpet (i)   Tim Mayotte 6–2, 5–7, 6–4

Doubles (3 wins)

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Result W–L Date Tournament Surface Partner Opponents Score
Win 1–0 Jun 1987 Athens, Greece Clay   Tore Meinecke   Jaroslav Navrátil
  Tom Nijssen
6–2, 3–6, 6–2
Win 2–0 Oct 1988 Toulouse, France Hard (i)   Tom Nijssen   Mansour Bahrami
  Guy Forget
6–3, 6–4
Win 3–0 Apr 1989 Nice, France Clay   Udo Riglewski   Heinz Günthardt
  Balázs Taróczy
7–6, 6–7, 6–1
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