Miami Heat head coach Erik Spoelstra watches a shot during the first half of Game 1 of their NBA basketball first-round playoff series against the Milwaukee Bucks Saturday, May 22, 2021, in Milwaukee. (AP Photo/Morry Gash)

Milwaukee Bucks head coach Mike Budenholzer reacts during the first half of Game 1 of their NBA basketball first-round playoff series against the Miami Heat Saturday, May 22, 2021, in Milwaukee. (AP Photo/Morry Gash)

Boston Celtics head coach Brad Stevens looks on during the first half of Game 1 of an NBA basketball first-round playoff series against the Brooklyn Nets, Saturday, May 22, 2021, in New York. (AP Photo/Corey Sipkin)