OKLAHOMA CITY, OK - MAY 23:  Dirk Nowitzki #41 of the Dallas Mavericks goes up for a shot against Kendrick Perkins #5 of the Oklahoma City Thunder in the first half in Game Four of the Western Conference Finals during the 2011 NBA Playoffs at Oklahoma City Arena on May 23, 2011 in Oklahoma City, Oklahoma. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement.  (Photo by Ronald Martinez/Getty Images)
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