| Singles | |
|---|---|
| 1984 Geneva Open | |
| Champion |  Aaron Krickstein |
| Runner-up |  Henrik Sundström |
| Score | 6–7, 6–1, 6–4 |
| Draw | 32 |
| Seeds | 8 |
Mats Wilander was the defending champion but lost in the quarterfinals this year.
Aaron Krickstein won the title, defeating Henrik Sundström 6–7, 6–1, 6–4 in the final.
Mats Wilander (quarterfinals) Henrik Sundström (final)
Juan Aguilera (quarterfinals)
Tomáš Šmíd (quarterfinals) Aaron Krickstein (champion) Libor Pimek (semifinals)
Zoltán Kuhárszky (first round) Emilio Sánchez (first round)| Semifinals | Final | ||||||||||||
| 5 | Aaron Krickstein | 6 | 6 | 6 | |||||||||
 Alejandro Ganzábal | 7 | 0 | 2 | ||||||||||
| 5 | Aaron Krickstein | 6 | 6 | 6 | |||||||||
| 2 | Henrik Sundström | 7 | 1 | 4 | |||||||||
| 6 | Libor Pimek | 3 | 4 | ||||||||||
| 2 | Henrik Sundström | 6 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | M Wilander | 6 | 6 | ||||||||||||||||||||||||
| WC |  R Stadler | 2 | 1 | 1 | M Wilander | 5 | 6 | 6 | |||||||||||||||||||
| J Avendaño | 2 | 7 | 3 | M Jaite | 7 | 4 | 2 | ||||||||||||||||||||
| M Jaite | 6 | 6 | 6 | 1 | M Wilander | 3 | 7 | 4 | |||||||||||||||||||
| Q | E Bengoechea | 6 | 3 | 6 | 5 | A Krickstein | 6 | 6 | 6 | ||||||||||||||||||
| Q | P Hjertquist | 4 | 6 | 3 | Q | E Bengoechea | 3 | 4 | |||||||||||||||||||
 D Tarr | 4 | 2 | 5 | A Krickstein | 6 | 6 | |||||||||||||||||||||
| 5 | A Krickstein | 6 | 6 | 5 | A Krickstein | 6 | 6 | 6 | |||||||||||||||||||
| 4 | T Šmíd | 6 | 7 | A Ganzábal | 7 | 0 | 2 | ||||||||||||||||||||
| Q | J Bardou | 2 | 6 | 4 | T Šmíd | 6 | 6 | ||||||||||||||||||||
 P Elter | 6 | 3 | 6 | P Elter | 3 | 3 | |||||||||||||||||||||
 P Doohan | 3 | 6 | 1 | 4 | T Šmíd | 7 | 2 | 6 | |||||||||||||||||||
| A Ganzábal | 1 | 7 | 6 | A Ganzábal | 6 | 6 | 7 | ||||||||||||||||||||
 R Viver | 6 | 6 | 2 | A Ganzábal | 6 | 6 | 7 | ||||||||||||||||||||
 S Colombo | 6 | 6 | S Colombo | 7 | 1 | 5 | |||||||||||||||||||||
| 8 | E Sánchez | 3 | 3 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | L Pimek | 2 | 6 | 6 | |||||||||||||||||||||||
| K Carlsson | 6 | 2 | 3 | 6 | L Pimek | 6 | 6 | ||||||||||||||||||||
| Q | J Čihák | 7 | 7 | Q | J Čihák | 0 | 4 | ||||||||||||||||||||
 J Fillol | 6 | 6 | 6 | L Pimek | 6 | 7 | |||||||||||||||||||||
| J Carlsson | 5 | 1 | 3 | J Aguilera | 1 | 6 | |||||||||||||||||||||
| WC | Christoph Meyer | 7 | 6 | WC | C Meyer | 2 | 2 | ||||||||||||||||||||
| C Panatta | 4 | 0 | 3 | J Aguilera | 6 | 6 | |||||||||||||||||||||
| 3 | J Aguilera | 6 | 6 | 6 | L Pimek | 3 | 4 | ||||||||||||||||||||
| 7 | Z Kuhárszky | 3 | 6 | 2 | H Sundström | 6 | 6 | ||||||||||||||||||||
| D Keretić | 6 | 7 | D Keretić | 6 | 6 | ||||||||||||||||||||||
 M Ostoja | 5 | 4 | G Urpí | 3 | 4 | ||||||||||||||||||||||
| G Urpí | 7 | 6 | D Keretić | 3 | 4 | ||||||||||||||||||||||
| A Tous | 7 | 7 | 2 | H Sundström | 6 | 6 | |||||||||||||||||||||
| G Rivas | 6 | 6 | A Tous | 3 | 3 | ||||||||||||||||||||||
| WC |  I Năstase | 2 | 6 | 2 | H Sundström | 6 | 6 | ||||||||||||||||||||
| 2 | H Sundström | 6 | 7 | ||||||||||||||||||||||||
Michael Chang defeated Stefan Edberg in the final, 6–1, 3–6, 4–6, 6–4, 6–2, to win the men's singles tennis title at the 1989 French Open. Chang became the youngest-ever major men's singles champion, winning the final at the age of 17 years, 3 months and 20 days and the first player of Asian descent to win the major. En route to the title, he defeated the world No. 1 and three-time champion Ivan Lendl, which is remembered as one of the most significant matches in French Open history.
Yannick Noah defeated the defending champion Mats Wilander in the final, 6–2, 7–5, 7–6(7–3) to win the men's singles tennis title at the 1983 French Open. Noah remains the most recent Frenchman to win the title, and his victory also marked the last time a man won a singles major with a wooden racket.
Ivan Lendl defeated Miloslav Mečíř in the final, 6–2, 6–2, 6–2 to win the men's singles tennis title at the 1989 Australian Open.
Mats Wilander defeated Ivan Lendl in the final, 6–1, 6–4, 6–4 to win the men's singles tennis title at the 1983 Australian Open.
John McEnroe defeated Ivan Lendl in the final, 6–3, 6–4, 6–1 to win the men's singles tennis title at the 1984 US Open. It was his fourth US Open singles title and seventh and last major singles title overall. It was Lendl's third consecutive runner-up finish at the US Open.
Tim Mayotte won in the final 4–6, 4–6, 6–3, 6–2, 6–4 against Scott Davis.
Mikael Pernfors was the defending champion but lost in the quarterfinals to Brad Gilbert.
Mats Wilander was the defending champion but lost in the semifinals to Stefan Edberg.
Yannick Noah defeated Carl-Uwe Steeb 5–7, 6–3, 6–4, to win the men's singles tennis title at the 1990 New South Wales Open.
John McEnroe was the defending champion, but did not participate this year.
Mats Wilander was the defending champion, but lost in the final this year.
Henri Leconte was the defending champion, but lost in the quarterfinals this year.
Mats Wilander was the defending champion.
Aaron Krickstein was the defending champion but lost in the second round this year.
Anders Järryd was the defending champion, but lost in the quarterfinals this year.
Andrés Gómez was the defending champion, but lost in the first round to Jan Gunnarsson.
Thierry Tulasne was the defending champion, but was forced to retire in his first round match against Gustavo Tiberti.
Mats Wilander successfully defended his title, by defeating Anders Järryd 6–1, 6–2 in the final.
Henrik Sundström was the defending champion, but lost in the quarterfinals to Damir Keretić.
Mats Wilander successfully defended his title, by defeating Anders Järryd 7–6, 6–3 in the final.