Charlotte Bobcats' Kemba Walker, front, drives past Boston Celtics' Kevin Garnett, rear, during the first half of an NBA basketball game in Charlotte, N.C., Monday, Feb. 11, 2013. (AP Photo/Chuck Burton)

Charlotte Bobcats' Ramon Sessions (7) drives between Boston Celtics' Leandro Barbosa (12) and Jason Collins (98) during the first half of an NBA basketball game in Charlotte, N.C., Monday, Feb. 11, 2013. (AP Photo/Chuck Burton)

Charlotte Bobcats' Byron Mullens (22) holds onto the ball as Boston Celtics' Paul Pierce (34) falls on him during the first half of an NBA basketball game in Charlotte, N.C., Monday, Feb. 11, 2013. (AP Photo/Chuck Burton)

Boston Celtics' Jeff Green, front, falls as he is fouled by Charlotte Bobcats' Jeffery Taylor, rear, during the first half of an NBA basketball game in Charlotte, N.C., Monday, Feb. 11, 2013. (AP Photo/Chuck Burton)

Boston Celtics head coach Doc Rivers reacts to a call during the first half of an NBA basketball game against the Charlotte Bobcats in Charlotte, N.C., Monday, Feb. 11, 2013. (AP Photo/Chuck Burton)

Charlotte Bobcats' Ramon Sessions (7) shoots as Boston Celtics' Kevin Garnett (5), Avery Bradley (0), and Courtney Lee (11) watch during the closing seconds of an NBA basketball game in Charlotte, N.C., Monday, Feb. 11, 2013. Sessions' basket gave the Bobcats the lead as they defeated the Celtics 94-91. (AP Photo/Chuck Burton)

Boston Celtics head coach Doc Rivers, top left, holds the hand of Leandro Barbosa, bottom, as a trainer examines him during the second half of an NBA basketball game against the Charlotte Bobcats in Charlotte, N.C., Monday, Feb. 11, 2013. Barbosa left the game. The Bobcats won 94-91. (AP Photo/Chuck Burton)

Boston Celtics' Kevin Garnett (5) fouls Charlotte Bobcats' Byron Mullens (22) during the second half of an NBA basketball game in Charlotte, N.C., Monday, Feb. 11, 2013. The Bobcats won 94-91. (AP Photo/Chuck Burton)

Boston Celtics' Kevin Garnett (5) shoots over Charlotte Bobcats' Kemba Walker (15) and Gerald Henderson (9) during the second half of an NBA basketball game in Charlotte, N.C., Monday, Feb. 11, 2013. The Bobcats won 94-91. (AP Photo/Chuck Burton)

Charlotte Bobcats' Byron Mullens (22) is congratulated by a teammate after making a basket against the Boston Celtics during the second half of an NBA basketball game in Charlotte, N.C., Monday, Feb. 11, 2013. The Bobcats won 94-91. (AP Photo/Chuck Burton)

Boston Celtics' Paul Pierce, front, is fouled by Charlotte Bobcats' Ramon Sessions, rear, during the second half of an NBA basketball game in Charlotte, N.C., Monday, Feb. 11, 2013. The Bobcats won 94-91. (AP Photo/Chuck Burton)