Robert Williams steps up with a career-high 18 points as Boston solidifies its hold on third place in the East, scoring its most points since 1992 despite the absence of Kemba Walker.

Boston’s lead for the No. 3 seed is down to 1 1/2 games to Miami

Jayson Tatum and Jaylen Brown combine for 64 points in a 128-124 win.

Giannis Antetokounmpo has 36 points and 15 rebounds – and benefits from an overturned call – as Milwaukee beats Boston, 119-112.

Kemba Walker came to Boston with hopes of playing at the Garden in front of rabid Celtics fans in the playoffs, but is dealing with the new reality.

The offense could take a bit more time to come together, but Boston has a solid defensive foundation.