| Singles | |
|---|---|
| 2003 Brasil Open | |
| Champion |  Sjeng Schalken |
| Runner-up |  Rainer Schüttler |
| Score | 6–2, 6–4 |
Gustavo Kuerten was the defending champion but lost in the semifinals to Rainer Schüttler.
Sjeng Schalken won in the final 6–2, 6–4 against Rainer Schüttler.
Rainer Schüttler (final) Sjeng Schalken (champion)
Gustavo Kuerten (semifinals)
Fernando González (first round)
Vince Spadea (quarterfinals)
Juan Ignacio Chela (second round) Flávio Saretta (second round)
Kenneth Carlsen (quarterfinals)| Semifinals | Final | ||||||||||||
| 1 | Rainer Schüttler | 6 | 2 | 7 | |||||||||
| 3 | Gustavo Kuerten | 4 | 6 | 5 | |||||||||
| 1 | Rainer Schüttler | 2 | 4 | ||||||||||
| 2 | Sjeng Schalken | 6 | 6 | ||||||||||
| Q | Gastón Etlis | 1 | 0r | ||||||||||
| 2 | Sjeng Schalken | 6 | 2 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | R Schüttler | 6 | 6 | ||||||||||||||||||||||||
| WC | A Sá | 2 | 0 | 1 | R Schüttler | 6 | 6 | ||||||||||||||||||||
| P Goldstein | 6 | 6 | P Goldstein | 0 | 1 | ||||||||||||||||||||||
| F Browne | 2 | 0 | 1 | R Schüttler | 6 | 6 | |||||||||||||||||||||
 R Delgado | 6 | 5 | R Delgado | 1 | 3 | ||||||||||||||||||||||
| M Puerta | 3 | 1r | R Delgado | 2 | 6 | 6 | |||||||||||||||||||||
| WC | M Daniel | 4 | 3 | 7 | F Saretta | 6 | 3 | 4 | |||||||||||||||||||
| 7 | F Saretta | 6 | 6 | 1 | R Schüttler | 6 | 2 | 7 | |||||||||||||||||||
| 3 | G Kuerten | 6 | 6 | 3 | G Kuerten | 4 | 6 | 5 | |||||||||||||||||||
 M Norman | 3 | 2 | 3 | G Kuerten | 6 | 6 | |||||||||||||||||||||
 W Eschauer | 5 | 77 | 77 | W Eschauer | 2 | 1 | |||||||||||||||||||||
| Q | J Silva | 7 | 62 | 61 | 3 | G Kuerten | 6 | 6 | |||||||||||||||||||
| Q | P Capdeville | 77 | 0 | 1 | R Mello | 2 | 2 | ||||||||||||||||||||
| R Mello | 64 | 6 | 6 | R Mello | 2 | 6 | 6 | ||||||||||||||||||||
 T Larkham | 4 | 6 | 1 | 6 | J I Chela | 6 | 2 | 4 | |||||||||||||||||||
| 6 | J I Chela | 6 | 2 | 6 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 8 | K Carlsen | 4 | 6 | 713 | |||||||||||||||||||||||
| WC | F Ferreiro | 6 | 4 | 611 | 8 | K Carlsen | 7 | 65 | 6 | ||||||||||||||||||
 I Miranda | 4 | 4 |  W Moodie | 5 | 77 | 3 | |||||||||||||||||||||
| W Moodie | 6 | 6 | 8 | K Carlsen | 4 | 77 | 3 | ||||||||||||||||||||
| Q | G Etlis | 1 | 6 | 6 | Q | G Etlis | 6 | 62 | 6 | ||||||||||||||||||
| B Vahaly | 6 | 2 | 3 | Q | G Etlis | 7 | 4 | 77 | |||||||||||||||||||
| E Taino | 77 | 7 | E Taino | 5 | 6 | 65 | |||||||||||||||||||||
| 4 | F González | 65 | 5 | Q | G Etlis | 1 | 0r | ||||||||||||||||||||
| 5 | V Spadea | 6 | 7 | 2 | S Schalken | 6 | 2 | ||||||||||||||||||||
| G Cañas | 4 | 5 | 5 | V Spadea | 6 | 2 | 3 | ||||||||||||||||||||
| H Gamonal | 77 | 6 | H Gamonal | 1 | 6 | 1r | |||||||||||||||||||||
| Q |  M Quintero | 60 | 2 | 5 | V Spadea | 60 | 2 | ||||||||||||||||||||
| A Popp | 1 | 6 | 1 | 2 | S Schalken | 77 | 6 | ||||||||||||||||||||
 G Carraz | 6 | 4 | 6 | G Carraz | 5 | 4 | |||||||||||||||||||||
| C Saulnier | 64 | 6 | 3 | 2 | S Schalken | 7 | 6 | ||||||||||||||||||||
| 2 | S Schalken | 77 | 2 | 6 | |||||||||||||||||||||||
Roger Federer defeated Marat Safin in the final, 7–6(7–3), 6–4, 6–2 to win the men's singles tennis title at the 2004 Australian Open. It was his first Australian Open title and second major title overall. With the win, Federer gained the world No. 1 ranking for the first time in his career, and would hold the position for a record 237 consecutive weeks.
Juan Carlos Ferrero defeated Martin Verkerk in the final, 6–1, 6–3, 6–2 to win the men's singles tennis title at the 2003 French Open. It was his first and only major singles title.
Albert Costa defeated Juan Carlos Ferrero in the final, 6–1, 6–0, 4–6, 6–3 to win the men's singles tennis title at the 2002 French Open. It was his first and only major singles title.
Gastón Gaudio defeated Guillermo Coria in the final, 0–6, 3–6, 6–4, 6–1, 8–6 to win the men's singles tennis title at the 2004 French Open. It was his first and only major title, and Gaudio became the first Argentine to win a major since Guillermo Vilas at the 1979 Australian Open. Gaudio came back from two sets down, saved two championship points, and twice broke Coria's serve when the latter was serving for the championship.
Andy Roddick defeated Juan Carlos Ferrero in the final, 6–3, 7–6(7–2), 6–3 to win the men's singles tennis title at the 2003 US Open. It was his first and only major title. Roddick remains the most recent American to win a major men's singles title. Roddick saved a match point en route to the title, in the semifinals against David Nalbandian. He also completed the "Summer Slam," having won Masters titles in Canada and Cincinnati in the lead-up to the US Open.
Andy Roddick defeated David Nalbandian in the final, 6–1, 6–3 to win the men's singles tennis title at the 2003 Canada Masters.
Guillermo Cañas was the defending champion but lost in the quarterfinals to Karol Kučera.
Gustavo Kuerten was the defending champion of the singles event at the Heineken Open tennis tournament, held in Auckland, New Zealand, but lost in the semifinals to Dominik Hrbatý.
Jan Vacek was the defending champion but did not compete that year.
Sjeng Schalken was the defending champion but did not compete that year.
Andre Agassi defeated Marat Safin in the final, 7–6(7–1), 6–2, 4–6, 6–4 to win the singles tennis title at the 1999 Paris Open.
Defending champion Lleyton Hewitt defeated Gustavo Kuerten in the final, 6–1, 6–1 to win the men's singles tennis title at the 2003 Indian Wells Masters. Hewitt saved three match points in his first round encounter against Younes El Aynaoui.
Two-time defending champion Andre Agassi defeated Carlos Moyá in the final, 6–3, 6–3 to win the men's singles tennis title at the 2003 Miami Open.
Defending champion Juan Carlos Ferrero defeated Guillermo Coria in the final, 6–2, 6–2 to win the singles tennis title at the 2003 Monte Carlo Masters.
Félix Mantilla defeated Roger Federer in the final, 7–5, 6–2, 7–6(10–8) to win the men's singles tennis title at the 2003 Italian Open.
Andy Roddick defeated Mardy Fish in the final, 4–6, 7–6(7–3), 7–6(7–4) to win the singles tennis title at the 2003 Cincinnati Masters.
Juan Carlos Ferrero defeated Nicolás Massú in the final, 6–3, 6–4, 6–3 to win the singles tennis title at the 2003 Madrid Open.
Roger Federer defeated Tim Henman in the final, 6–3, 6–3, to win the men's singles tennis title at the 2004 Indian Wells Masters.
Andy Roddick won the men's singles tennis title at the 2004 Miami Open after Guillermo Coria retired in the final, with the scoreline at 6–7(2–7), 6–3, 6–1.
Sjeng Schalken was the defending champion, but lost in the first round this year.