Charlotte Bobcats' Ramon Sessions (7) has his shot blocked by Dallas Mavericks' Jose Calderon (8) during the first half of an NBA basketball game in Charlotte, N.C., Tuesday, Feb. 11, 2014. (AP Photo/Chuck Burton)
Charlotte Bobcats' Gerald Henderson (9) drives between Dallas Mavericks' Samuel Dalembert, left, and Shawn Marion, right, during the first half of an NBA basketball game in Charlotte, N.C., Tuesday, Feb. 11, 2014. (AP Photo/Chuck Burton)
Dallas Mavericks' Dirk Nowitzki (41) reacts after dunking during the first half of an NBA basketball game against Charlotte Bobcats in Charlotte, N.C., Tuesday, Feb. 11, 2014. (AP Photo/Chuck Burton)
Dallas Mavericks forward Dirk Nowitzki (41) fights for position near the basket as Utah Jazz's Jeremy Evans, right, defends in the second half of an NBA basketball game, Friday, Feb. 7, 2014, in Dallas. Nowitkzi had 20-points in the 103-81 Mavericks victory. (AP Photo/Tony Gutierrez)
Dallas Mavericks point guard Devin Harris (20) drives to the hoop as Boston Celtics Boston Celtics point guard Phil Pressey (26) applies defensive pressure during the second half of their NBA basketball game in Boston, Sunday, Feb. 9, 2014. The Mavericks defeated the Celtics 102-91. (AP Photo/Stephan Savoia)
Dallas Mavericks shooting guard Vince Carter (25) shoots over Boston Celtics center Kris Humphries (43) during the second half of their NBA basketball game in Boston, Sunday, Feb. 9, 2014. The Mavericks defeated the Celtics 102-91. (AP Photo/Stephan Savoia)
Boston Celtics center Jared Sullinger (7) knocks the ball away as he fouls Dallas Mavericks power forward Dirk Nowitzki (41) going to the hoop during the second half of their NBA basketball game in Boston, Sunday, Feb. 9, 2014. The Mavericks defeated the Celtics 102-91. (AP Photo/Stephan Savoia)