Boston Celtics center Kristaps Porzingis dunks next to Dallas Mavericks center Dereck Lively II, foreground, during the first half of Game 1 of basketball's NBA Finals on Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
Dallas Mavericks guard Luka Doncic (77) looks for an opening as Boston Celtics guard Jaylen Brown (7) and center Al Horford (42) defend during the first half of Game 1 of basketball's NBA Finals on Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
Boston Celtics center Kristaps Porzingis (8) celebrates a 3-pointer, near Dallas Mavericks center Daniel Gafford (21) during the first half of Game 1 of basketball's NBA Finals on Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
Boston Celtics forward Jayson Tatum (0) passes the ball around Dallas Mavericks guard Luka Doncic (77) as forward Derrick Jones Jr. (55) and center Daniel Gafford (21) defend during the first half of Game 1 of basketball's NBA Finals on Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
A display honoring basketball great Bill Walton appears on a screen before Game 1 of basketball's NBA Finals between the Boston Celtics and the Dallas Mavericks, Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
Dallas Mavericks coach Jason Kidd argues a call during the first half of Game 1 of the basketball team's NBA Finals against the Boston Celtics, Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
Dallas Mavericks guard Kyrie Irving drives toward the basket as Boston Celtics center Al Horford (42) defends during the first half of Game 1 of basketball's NBA Finals on Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
Boston Celtics center Kristaps Porzingis heads to the court while wearing a warmup shirt honoring basketball great Bill Walton before Game 1 of the basketball team's NBA Finals against the Dallas Mavericks, Thursday, June 6, 2024, in Boston. (AP Photo/Michael Dwyer)
Dallas Mavericks forward P.J. Washington, left, fouls Boston Celtics guard Jaylen Brown, center, during the first half of Game 1 of basketball's NBA Finals on Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
Boston Celtics guard Jaylen Brown, fornt, and Dallas Mavericks guard Kyrie Irving vie for the ball during the first half of Game 1 of basketball's NBA Finals, Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
Boston Celtics coach Joe Mazzulla calls to players during the first half of Game 1 of the basketball team's NBA Finals against the Dallas Mavericks, Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
Boston Celtics forward Jayson Tatum, right, drives toward the basket as Dallas Mavericks center Daniel Gafford, left, and forward Derrick Jones Jr., below, defend during the first half of Game 1 of basketball's NBA Finals on Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
Dallas Mavericks center Daniel Gafford (21) shoots as Boston Celtics guard Jaylen Brown (7) and guard Jrue Holiday (4) defend during the first half of Game 1 of basketball's NBA Finals on Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
Boston Celtics forward Jayson Tatum (0) drives toward the basket as Dallas Mavericks guard Luka Doncic (77) defends during the first half of Game 1 of basketball's NBA Finals on Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
Boston Celtics guard Jaylen Brown, right, drives toward the basket as Dallas Mavericks forward P.J. Washington defends during the first half of Game 1 of basketball's NBA Finals on Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)