Oklahoma City Thunder's Russell Westbrook, right, defends against Boston Celtics' Kyrie Irving, left, during the first half of an NBA basketball game in Boston, Sunday, Feb. 3, 2019. (AP Photo/Michael Dwyer)

Oklahoma City Thunder's Steven Adams (12) struggles to control the ball as Boston Celtics' Kyrie Irving (11) and Al Horford (42) defend during the first half of an NBA basketball game in Boston, Sunday, Feb. 3, 2019. (AP Photo/Michael Dwyer)

Boston Celtics' Marcus Morris (13) drives past Oklahoma City Thunder's Jerami Grant (9) during the first half of an NBA basketball game in Boston, Sunday, Feb. 3, 2019. (AP Photo/Michael Dwyer)

Oklahoma City Thunder's Russell Westbrook (0) protests a call beside Boston Celtics' Marcus Morris (13) during the first half of an NBA basketball game in Boston, Sunday, Feb. 3, 2019. (AP Photo/Michael Dwyer)