Boston was overwhelmed, with Sacramento shooting 53.7 percent from the floor including 10-of-20 from beyond the three-point line. The Celtics' leading scorers were Jason Terry and Paul Pierce, who each had 20 points in the defeat.
Boston is now 14-16 and currently riding a three-game losing streak.
It was a tough loss for the Bucks who dropped to 16-13 on the year. Monta Ellis led all scorers with 30 points.
San Antonio is 24-8, largely due to Tim Duncan, Manu Ginobili and Tony Parker. In this game, the trio combined for 59 points.