Smart (ankle) has been ruled out for Friday's game against the Bulls. Smart had been labeled as questionable to suit up Friday, but the Celtics decided to back off the idea of returning him to the lineup after he saw only minimal involvement in Wednesday's practice. He'll likely try to increase his activity over the next couple days in an effort to better test out his ankle, and if he shows a decent amount of progression, he could be a lineup option for Sunday's tilt with the Spurs.