Celtics Highlights January 20, 2021 10:54 pm Full Game Highlights: Kemba Walker, Smart shine in Celtics' loss to 76ers Highlights from the Celtics 117-109 loss to the Philadelphia 76ers. Celtics Videos 0:37 Joe Mazzulla: ‘Process of winning' remains the same from regular season to playoffs 0:39 Al Horford: Closing out Heat in Game 5 ‘shows growth' for Celtics 2:35 Celtics earn dominant series win over Heat 4:35 Mazzulla – Part Two: Sacrifices and Mindset 0:51 Jayson Tatum: ‘Lazy to say teams can out-tough us'