Jaroslav Navrátil and Tom Nijssen were the defending champions but did not compete that year.
Tom Nijssen and Cyril Suk were the defending champions, but lost in the semifinals this year.
Manon Bollegraf and Tom Nijssen were the defending champions but only Nijssen competed that year with Helena Suková.
Tom Nijssen (born 1 October 1964 in Maastricht) is a former professional tennis player from the Netherlands.
Tom Nijssen and Cyril Suk won in the final 6–4, 6–4, against Alex O'Brien and Jonathan Stark.
The Mixed Doubles tournament at the 1989 French Open was held from 29 May until 11 June 1989 on the outdoor clay courts at the Stade Roland Garros in Paris, France.
 Manon Bollegraf and Tom Nijssen won the title, defeating Horacio de la Peña and Arantxa Sánchez Vicario in the final.
Wally Masur and Tom Nijssen were the champions of the event when it last took place, in 1988.
 Neither of them participated in 1990.
<br>Emilio Sánchez and Slobodan Živojinović won the title, defeating Goran Ivanišević and Balázs Taróczy 7–5, 6–3, in the final.
Mark Knowles (born 4 September 1971) is a former tennis player from the Bahamas, specialising in doubles tennis.
 He has won a number of Grand Slam tournaments, most notably partnering with Daniel Nestor.
 At various times between 2002 and 2005 he was ranked World No. 1 in doubles.
 He is a five-time Olympian.
Jakob Hlasek and John McEnroe were the defending champions, but lost in the quarterfinals.
<br>Omar Camporese and Diego Nargiso won the title, defeating Tom Nijssen and Udo Riglewski 6–4, 6–4, in the final.
Broderick Dyke and Tom Nijssen were the defending champions, but Nijssen did not participate this year.
 Dyke partnered Kelly Evernden, losing in the first round.

Question: Who was born first, Tom Nijssen or Mark Knowles?
Answer: Tom Nijssen