Ricki Osterthun is a former tennis player from West Germany, who won one single title during his professional career.
The 1994 Dutch Open was an ATP tennis tournament held in Hilversum, Netherlands and played on outdoor clay courts. It was the 37th edition of the tournament and was held from 25 July to 1 August 1994. Unseeded Karel Nováček won his first title of the year, and 13th of his career. It was his 3rd win at Hilversum, having also won in 1989 and 1992.
The 1986 Bavarian Tennis Championships was a men's Grand Prix Tennis Circuit held in Munich, West Germany. The tournament was held from 5 May through 12 May 1986. It is now part of the ATP Tour. Emilio Sánchez won the singles title.
The 1985 Nabisco Grand Prix was a professional men's tennis circuit held that year. It consisted of 71 tournaments held in 19 different countries. The tour incorporated the four ITF grand slam tournaments, three World Championship Tennis tournaments and the Grand Prix tournaments. Total prize money for the circuit was $23 million. The circuit was administered by the Men's International Professional Tennis Council (MIPTC). In November 1985 the MIPTC sued player–management agencies ProServ and IMG alleging that these firms were holding the tennis game hostage and were 'exerting extensive power over players'.
The 1984 Custom Credit Australian Indoor Championships was a men's tennis tournament played on indoor hard courts at the Sydney Entertainment Centre in Sydney in Australia and was part of the 1984 Volvo Grand Prix. The tournament ran from 8 October through 14 October 1984. Second-seeded Anders Järryd won the singles title.
The 1993 Dutch Open was an ATP men's tennis tournament played on outdoor clay courts in Hilversum, Netherlands that was part of the World Series category of the 1993 ATP Tour. It was the 36th edition of the tournament and was held from 26 July until 1 August 1993. Unseeded Carlos Costa won the singles title.
The 1992 Dutch Open was an ATP men's tennis tournament staged in Hilversum, Netherlands that was part of the World Series of the 1992 ATP Tour. It was the 35th edition of the tournament and was held from 20 July until 26 July 1992. Czechoslovakia's Karel Nováček, who was seeded third, won his first individual title of the year, and eighth of his career.
The 1991 Dutch Open was a men's tennis tournament played on outdoor clay courts in Hilversum in the Netherlands that was part of the World Series of the 1991 ATP Tour. It was the 34th edition of the tournament and was held from 22 July until 28 July 1991. Fourth-seeded Magnus Gustafsson won the singles title
The 1990 Dutch Open was an ATP men's tennis tournament staged in Hilversum, Netherlands. It was the 33rd edition of the tournament and was held from 23 July until 29 July 1990. Spain's Francisco Clavet won his first individual title of the year, and first of his career. Unseeded Francisco Clavet won the singles title.
The 1989 Swatch Open, also known as the Nice Open, was a men's tennis tournament played on outdoor clay courts at the Nice Lawn Tennis Club in Nice, France, and was part of the 1989 Nabisco Grand Prix. It was the 18th edition of the tournament and took place from 17 April through 23 April 1989. Sixth-seeded Andrei Chesnokov won the singles title.
The 1986 Dutch Open was a Grand Prix men's tennis tournament staged in Hilversum, Netherlands. The tournament was played on outdoor clay courts and was held from 28 July until 3 August 1986. It was the 29th edition of the tournament. Seventh-seeded Thomas Muster, who entered on a wildcard, won the singles title.
The 1984 Dutch Open was a Grand Prix men's tennis tournament staged in Hilversum, Netherlands. The tournament was played on outdoor clay courts and was held from 23 July until 29 July 1984. It was the 27th edition of the tournament. Anders Järryd won the singles title.
The 1983 Dutch Open was a Grand Prix tennis tournament staged in Hilversum, Netherlands. The tournament was played on outdoor clay courts and was held from 18 July until 24 July 1983. It was the 26th edition of the tournament. Tomáš Šmíd won the singles title.
The 1976 Dutch Open was a men's tennis tournament staged in Hilversum, Netherlands that was part of the one star category of the 1976 Grand Prix. The tournament was played on outdoor clay courts and was held from 13 July until 19 July 1976. It was the 19th edition of the tournament. Second-seeded Balázs Taróczy won the singles title.
The 1975 Dutch Open was a men's tennis tournament staged at 't Melkhuisje in Hilversum, Netherlands which was part of the Group B tier of the 1975 Grand Prix. The tournament was played on outdoor clay courts and was held from 20 July to 27 July 1975. It was the 18th edition of the tournament, and first-seeded Guillermo Vilas won his second consecutive singles title at the event.
The 1974 Dutch Open was a men's tennis tournament staged at 't Melkhuisje in Hilversum, Netherlands that was part of the Group C tier of the 1974 Commercial Union Assurance Grand Prix circuit. The tournament was played on outdoor clay courts and was held from 21 July until 28 July 1974. It was the 17th edition of the tournament. First-seeded Guillermo Vilas won the singles title and earned $5,000 first-prize money. For the first time no women's events were held.
The 1982 Swedish Open was a men's professional tennis tournament played on outdoor clay courts and held in Båstad, Sweden. It was part of the 1982 Grand Prix circuit. It was the 35th edition of the tournament and was held from 12 July through 19 July 1982. First-seeded Mats Wilander won the singles title.
The 1987 Grand Prix de Tennis de Toulouse was a men's tennis tournament played on indoor carpet courts in Toulouse, France that was part of the Regular Series of the 1987 Grand Prix tennis circuit. It was the sixth edition of the tournament and was held from 12 October until 18 October 1987. First-seeded Tim Mayotte won the singles title.
The 1988 Grand Prix de Tennis de Toulouse was a men's tennis tournament played on indoor carpet courts in Toulouse, France that was part of the Regular Series of the 1988 Grand Prix tennis circuit. It was the seventh edition of the tournament and was held from 10 October until 16 October 1988. Second-seeded Jimmy Connors won the singles title.
The 1986 Dutch Open – Singles was an event of the 1975 Dutch Open tennis tournament and was played on outdoor clay courts at 't Melkhuisje in Hilversum in the Netherlands from 28 July until 3 August 1986 The draw comprised 32 players and 8 of them were seeded. Ricki Osterthun was the defending Dutch Open singles champion but lost in the second round. Seventh-seeded Thomas Muster won the title by defeating Jakob Hlasek in the final, 6–1, 6–3, 6–3.
Ricki Osterthun [1] 
Stefan Simonsson / 