Celtics' Marcus Smart, Robert Williams speak highly of Nets' Kyrie Irving after Friday's gameIrving played for the Celtics from 2017-1911/29/2019, 11:01 PMFeb 13, 2019; Boston, MA, USA; Dressed in street clothes, Boston Celtics guard Kyrie Irving (11) has a laugh with guard Marcus Smart (36) during the second half against the Detroit Pistons at TD Garden. Mandatory Credit: Winslow Townson-USA TODAY Sports / Winslow Townson