CLEVELAND, OH - MAY 25: Head coach Brad Stevens of the Boston Celtics speaks to Marcus Smart in the second quarter against the Cleveland Cavaliers during Game Six of the 2018 NBA Eastern Conference Finals at Quicken Loans Arena on May 25, 2018 in Cleveland, Ohio. 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 Gregory Shamus/Getty Images)