NEW YORK, NEW YORK - MAY 25: Head coach Brad Stevens of the Boston Celtics looks on during the first half of Game Two of their Eastern Conference first-round playoff series against the Brooklyn Nets at Barclays Center on May 25, 2021 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 Sarah Stier/Getty Images)