The 2003 Canada Masters – Doubles was the men's doubles event of the one hundred and fourteenth edition of the Canada Masters; a WTA Tier I tournament and the most prestigious men's tennis tournament held in Canada.
 Bob Bryan and Mike Bryan were the defending champions but lost in the semifinals to Jonas Björkman and Todd Woodbridge.
 Mahesh Bhupathi and Max Mirnyi won in the final 6–3, 7–6 against Björkman and Woodbridge.
Jonas Björkman and Todd Woodbridge were the defending champions, but did not participate together this year.
 Björkman partnered Max Mirnyi, losing in the first round.
 Woodbridge retired from professional tennis earlier in the year.
Todd Woodbridge and Mark Woodforde were the defending champions, but Woodforde did not participate.
 Woodbridge partnered with Jonas Björkman but they lost in the third round to Bob and Mike Bryan.
Todd Woodbridge and Mark Woodforde were the defending champions but only Woodbridge competed that year with Wayne Ferreira.
John Austin (born July 31, 1957) is an American former professional tennis player born in Long Beach, California.
 He won the Wimbledon mixed doubles championship with his sister, Tracy Austin, in 1980, becoming the first brother and sister team to win a Grand Slam title together.
Todd Woodbridge and Mark Woodforde were the defending champions but only Woodbridge competed that year with Wayne Arthurs.
Arantxa Sánchez Vicario and Todd Woodbridge were the defending champions but they competed with different partners that year, Sánchez Vicario with Emilio Sánchez and Woodbridge with Helena Suková.
Todd Andrew Woodbridge, OAM (born 2 April 1971) is a retired Australian tennis player.
 He was born in Sydney and raised in Kogarah Bay by his parents, Kevin and Barbara.
 He has two older brothers, Gregory and Warren.
 He attended Lyneham High School, Canberra, then turned professional in 1988.
Helena Suková and Todd Woodbridge were the defending champions but only Woodbridge competed that year with Jana Novotná.
Elizabeth Smylie and Todd Woodbridge were the defending champions but they competed with different partners that year, Smylie with John Fitzgerald and Woodbridge with Nicole Provis.

Question: Which sport do both John Austin and Todd Woodbridge play?
Answer: tennis