Wladimir Klitschko withdrew from his WBO and IBF heavyweight title defense against unbeaten British challenger Dereck Chisora because of a torn muscle in his back.

Klitschko's 19th title defense was scheduled for Saturday in Mannheim, Germany, but he pulled out yesterday with an injury described by his boxing adviser in the United States as not being particularly serious.

Talks are now expected between the fighters' representatives over rescheduling the fight.

Horse Racing

* New Jersey Gov. Chris Christie vetoed the state Racing Commission's decision to hold full schedules at the Meadowlands and Monmouth Park racetracks next year, saying it would be inappropriate while lawmakers review proposals to reduce the state's role in operating horse racing.

* Off-track betting sites in New York City are shutting down after the state Senate rejected a plan to rescue the struggling operation.

Philly File

* Chris Lubanski, former Kennedy-Kenrick product, signed a minor league contract with the Florida Marlins and will be invited to spring training. A 2003 first-round draft pick of Kansas City and Gatorade national high school player of the year, he earned Triple A All-Star honors in 2010 for Las Vegas, of the Pacific Coast League.

Sport Stops

* England's Florentyna Parker shot a 5-under-par 67 to take a one-shot lead in the first round of the Dubai Ladies Masters, the season-ending tournament on the Ladies European Tour.

* USA Swimming named University of Florida coach Gregg Troy as men's coach for the 2012 London Games and University of California coach Teri McKeever as women's coach.

* Lance Armstrong's cycling team signed up to race in Colorado's inaugural Quiznos Pro Challenge in August. *