NEW YORK, NEW YORK - MAY 22: Marcus Smart #36 of the Boston Celtics reacts in the third quarter against the Brooklyn Nets during Game One of their Eastern Conference first-round playoff series on May 22, 2021 at Barclays Center in the Brooklyn borough of New York City. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Elsa/Getty Images)