Boston's slower pace is the starting point for Bucks-Celtics Under 223.5. Through seven games, the Celtics have averaged 96.8 possessions per 48 minutes, 26th in the NBA.
Milwaukee ranks 24th in offensive efficiency at 108.4 points per 100 possessions through seven games. The Bucks have shot 43.3% from the field and 33.3% from 3.
Boston has allowed 109.1 points per game over the same stretch. A game closer to the Celtics' tempo would leave Milwaukee fewer possessions to make up for those shooting struggles.