Miami Heat reserve guard Dru Smith left Monday night’s game against the Brooklyn Nets because of a lower left leg injury and did not return. Smith will undergo an MRI on Tuesday, Heat coach Erik Spoelstra said after his team’s 110-95 victory. As Smith dribbled during a possession early in the second quarter, he lost the ball on a turnover and immediately fell to the court grimacing in pain. Smith was escorted off the court to the locker room.