| Men's doubles | |
|---|---|
| 2005 China Open | |
| Champions |  Justin Gimelstob  Nathan Healey |
| Runners-up |  Dmitry Tursunov Mikhail Youzhny |
| Final score | 4–6, 6–3, 6–2 |
Justin Gimelstob and Graydon Oliver were the defending champions, but Oliver did not participate this year. Gimelstob partnered Nathan Healey and successfully defended his title.
Gimelstob and Healey won the title, defeating Dmitry Tursunov and Mikhail Youzhny 4–6, 6–3, 6–2 in the final.
Wayne Arthurs / Jordan Kerr (semifinals) Ashley Fisher / 
Robert Lindstedt (quarterfinals)
Jarkko Nieminen / 
Rainer Schüttler (first round) Huntley Montgomery / Tripp Phillips (first round)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | W Arthurs J Kerr | 67 | 68 | ||||||||||||||||||||||||
| WC |  XY Yu SX Zeng | 55 | 56 | 1 | W Arthurs J Kerr | 6 | 55 | 68 | |||||||||||||||||||
| WC | P Sun Y Wang | 2 | 3 | T Johansson  R Koenig | 3 | 67 | 56 | ||||||||||||||||||||
| T Johansson R Koenig | 6 | 6 | 1 | W Arthurs J Kerr | 2 | 6 | 56 | ||||||||||||||||||||
| 3 | J Nieminen R Schüttler | 6 | 55 | 4 | J Gimelstob N Healey | 6 | 3 | 68 | |||||||||||||||||||
| J Gimelstob N Healey | 1 | 67 | 6 | J Gimelstob N Healey | 6 | 6 | |||||||||||||||||||||
 D Udomchoke  Y-t Wang | 67 | 610 | D Udomchoke Y-t Wang | 2 | 3 | ||||||||||||||||||||||
| Alt |  I Heuberger  N Okun | 55 | 58 | J Gimelstob N Healey | 4 | 6 | 6 | ||||||||||||||||||||
| D Tursunov M Youzhny | 6 | 67 | D Tursunov M Youzhny | 6 | 3 | 2 | |||||||||||||||||||||
| G Dragicevic M Pehar | 4 | 54 | D Tursunov M Youzhny | 6 | 6 | ||||||||||||||||||||||
| Sa Ratiwatana So Ratiwatana | 6 | 6 | Sa Ratiwatana So Ratiwatana | 4 | 4 | ||||||||||||||||||||||
| 4 | H Montgomery T Phillips | 4 | 2 | D Tursunov M Youzhny | 6 | 6 | |||||||||||||||||||||
L Burgsmüller  H-t Lee | 67 | 4 | 67 | L Burgsmüller H-t Lee | 4 | 4 | |||||||||||||||||||||
| N Rainey B Wilson | 54 | 6 | 54 | L Burgsmüller H-t Lee | 0 | 6 | 67 | ||||||||||||||||||||
A Hadad  S Koubek | 6 | 3 | 4 | 2 | A Fisher R Lindstedt | 6 | 2 | 53 | |||||||||||||||||||
| 2 | A Fisher R Lindstedt | 3 | 6 | 6 | |||||||||||||||||||||||
Marat Safin defeated Lleyton Hewitt in the final, 1–6, 6–3, 6–4, 6–4 to win the men's singles tennis title at the 2005 Australian Open. It was his second and last major title, having also won the 2000 US Open. Hewitt was the first Australian to reach the final since Pat Cash in 1988.
Bob and Mike Bryan were the defending champions, but lost in the third round to Leoš Friedl and Mikhail Youzhny.
Scott Humphries and Mark Merklein were the defending champions but lost in the final 6–2, 6–4 against Todd Perry and Thomas Shimada.
Mahesh Bhupathi and Leander Paes were the defending champions but did not compete that year.
Jared Palmer and Jeff Tarango were the defending champions, but Palmer did not participate this year. Tarango partnered Yevgeny Kafelnikov, losing in the first round.
Venus Williams and Justin Gimelstob defeated Helena Suková and Cyril Suk in the final, 6–2, 6–1 to win the Mixed Doubles title at the 1998 Australian Open.
Mariaan de Swardt and David Adams defeated Serena Williams and Max Mirnyi in the final, 6–4, 4–6, 7–6(7–5) to win the mixed doubles tennis title at the 1999 Australian Open.
Grant Stafford and Kevin Ullyett were the defending champions. Stafford chose to compete at Indianapolis in the same week. Ullyett partnered with Piet Norval but lost in the semifinals to the eventual champions Justin Gimelstob and Sébastien Lareau.
Justin Gimelstob and Sébastien Lareau won in the final over David Adams and John-Laffnie de Jager, 7–5, 6–7(2–7), 6–3.
Greg Rusedski was the defending champion, but did not participate.
Robert Kendrick and Jürgen Melzer were the defending champions but did not participate this year.
Jordan Kerr and Jim Thomas were the defending champions, but lost in the first round this year.
Justin Gimelstob and Richey Reneberg were the defending champions, but Gimelstob did not participate this year. Reneberg partnered Jared Palmer, successfully defending his title.
Cyril Suk and Michael Tebbutt were the defending champions, but lost in the quarterfinals this year.
The event was being held for the first time since 1997. Mahesh Bhupathi and Leander Paes were the defending champions.
Justin Gimelstob and Nathan Healey were the defending champions, but Gimelstob did not participate this year. Healey partnered Ashley Fisher, losing in the first round.
Grant Stafford and Kevin Ullyett were the defending champions, but Ullyett did not participate this year. Stafford partnered Lan Bale, losing in the quarterfinals.
Joshua Eagle and Andrew Florent were the defending champions, but did not participate together this year. Eagle partnered Patrick Rafter, losing in the quarterfinals. Florent partnered Andrew Kratzmann, losing in the first round.
Patrick Galbraith and Justin Gimelstob were the defending champions, but did not partner together this year. Galbraith partnered Brian MacPhie, losing in the quarterfinals. Gimelstob partnered Jared Palmer, losing in the first round.
Ellis Ferreira and Patrick Galbraith were the defending champions, but did not partner together this year. Ferreira partnered Rick Leach, losing in the first round. Galbraith partnered Brett Steven, losing in the first round.
Todd Woodbridge and Mark Woodforde were the defending champions, but lost in the quarterfinals to tournament runners-up Justin Gimelstob and Patrick Rafter.