Andy Roddick has pulled out of next week's Montreal Masters with an oblique muscle injury. It's the second consecutive week he has withdrawn from an event. The Montreal Gazette also reported that fifth-ranked Robin Soderling (wrist), Jurgen Melzer (quad), Guillermo Garcia-Lopez (appendicitis) and Xavier Malisse (personal) also withdrew from the tournament.

The 12th-ranked Roddick has been hampered by injuries during the past two years, and just two months ago was forced to pull out of Roland Garros with a shoulder injury. Feliciano Lopez upset the former world No. 1 in the third round of Wimbledon, and playing in the Davis Cup quarterfinals against Spain in his hometown of Austin, Roddick lost to David Ferrer. The American has not played since then and pulled out of Washington this week.

Roddick also pulled out of Canada last year, so he isn't defending any points. He is defending 360 semifinal points in Cincinnati the week after, and just entered the inaugural tournament in Winston-Salem, which is played the week before the U.S. Open. Responding to when he will return on Twitter, Roddick said. "Hopefully I'll be ready for cincy in 10 days or so.... Fingers crossed."