Video Headlines May 15, 2023 4:11 pm Chris Mannix: Celtics will defeat Heat in five games Sports Illustrated’s Chris Mannix joins Sports Sunday and explains why he believes the Celtics will take care of the Heat in five games. Celtics Videos 3:10 Celtics take care of business with 4-1 series win over Cavaliers 1:43 Do Tatum and Brown get enough credit for Celtics' sustained success? 10:37 Mazzulla – Part Three: Being Misunderstood and Returning to His Roots 1:02 Jayson Tatum talks relationship with Jaylen Brown as they head to their fifth ECF together 0:54 All Horford talks about ‘special' relationship with Celtics fans