Xavier Malisse and Olivier Rochus were the defending champions, but lost in the third round against third seeds and eventual finalists Bob & Mike Bryan.
Michaël Llodra and Fabrice Santoro were the defending champions, but they lost in quarterfinals 6–7(2), 5–7, against Jonas Björkman and Max Mirnyi.
Bob and Mike Bryan were the defending champions, they lost to sixth-seeded Michaël Llodra and Fabrice Santoro in the semifinals.
Sandon Stolle and Cyril Suk were the defending champions, but Stolle competed with Wayne Black, while Suk competed with Donald Johnson this year. Suk and Johnson were defeated by Stolle and Black in the third round, while Stolle and Black were defeated by Andrei Olhovskiy and David Prinosil in the quarterfinals.
Tim Henman and Nenad Zimonjić were the defending champions. They were both present but did not compete together.
Henman partnered with Yves Allegro and Zimonjić with Leander Paes.
Paul Haarhuis and Yevgeny Kafelnikov were defending champions, but they lost in the final to third seeds Bob and Mike Bryan, who won the first Grand Slam title of their careers.
The 2004 Canada Masters doubles was an event of the one hundred and fifteenth edition of the Canada Masters; a WTA Tier I tournament and the most prestigious men's tennis tournament held in Canada. Mahesh Bhupathi and Max Mirnyi were the defending champions. They were both present but did not compete together. Mirnyi partnered with Jonas Björkman, but Bhupathi and partner Leander Paes defeated them 6–4, 6–2, in the final.
Jacco Eltingh and Paul Haarhuis defeated Mark Knowles and Daniel Nestor in the final, 6–4, 6–2, 7–5 to win the doubles tennis title at the 1998 ATP Tour World Championships.
Michaël Llodra and Fabrice Santoro were the defending champions, and won the final 7–6(4), 6–3 against Bob and Mike Bryan.
Mahesh Bhupathi and Leander Paes defeated the defending champion Paul Haarhuis and his partner Jared Palmer in the final, 6–7(10–12), 6–3, 6–4, 7–6(7–4), to win the gentlemen's doubles title at the 1999 Wimbledon Championships.
Jonas Björkman and Jacco Eltingh were the defending champions, but Eltingh did not compete this year.
Björkman teamed up with Patrick Rafter, and they won the title defeating the first-seeded Indian team of Mahesh Bhupathi and Leander Paes in the final, 6–3, 4–6, 6–4, 6–7(10–12), 6–4. This would be Rafter's only grand slam doubles title.
Mark Knowles and Daniel Nestor were the defending champions, but lost in the first round to Paul Goldstein and Jim Thomas.
Yevgeny Kafelnikov and Daniel Vacek defeated Guy Forget and Jakob Hlasek in the final, 6–2, 6–3 to win the men's doubles tennis title at the 1996 French Open. As of 2024, Kafelnikov remains the most recent man to win both the singles and men's doubles events at the same edition of a major.
The 1998 Grand Prix de Tennis de Toulouse was a men's tennis tournament played on Indoor Hard in Toulouse, France that was part of the International Series of the 1998 ATP Tour. It was the seventeenth edition of the tournament and was held from 28 September – 4 October.
The 1999 German Open was a tennis tournament played on outdoor clay courts. It was the 92nd edition of the Hamburg Masters, and was part of the ATP Super 9 of the 1999 ATP Tour. It took place at the Rothenbaum Tennis Center in Hamburg, Germany, from through 3 May through 10 May 1999.
Mark Knowles and Daniel Nestor were the defending champions, but Knowles did not compete this year. Nestor teamed up with Cyril Suk and lost in quarterfinals to Olivier Delaître and Fabrice Santoro.
Andre Agassi and Petr Korda were the defending champions, but Agassi did not compete this year. Korda teamed up with Stefan Edberg and lost in second round to Cyril Suk and Daniel Vacek.
Yevgeny Kafelnikov and David Rikl were the defending champions, but none competed this year.
Patrick McEnroe and Jared Palmer were the defending champions, but none competed this year.
Javier Sánchez and Mark Woodforde were the defending champions, but competed this year with different partners. Sánchez teamed up with Luis Lobo and lost in the first round to David Adams and Andrei Olhovskiy, while Woodforde teamed up with Yevgeny Kafelnikov and lost in the quarterfinals to Luke Jensen and David Wheaton.
Mark Keil 
Cyril Suk 
