Ime Udoka knows the talent he has with All-Stars Jayson Tatum and Jaylen Brown and will build the team around its strengths.

Thomas, who has seen time with Cleveland and Houston, can play for Boston and Maine.

Boston guard Marcus Smart will miss the team’s final preseason game Friday, but should be ready for Wednesday’s season opener.

Al Horford tested positive for COVID-19 on Monday, and the mandatory 10-day quarantine means he probably won’t be available until after Boston begins its season against the Knicks on Oct. 20.

Dennis Schroder had missed a little time after suffering a left knee contusion.

Brown tested positive Friday, is asymptomatic and is entering isolation.

In a win over Orlando, Jaylen Brown looked in midseason form, while some of the young players struggled early before rallying in the fourth quarter to pull out a win.

The Celtics were not willing to give Al Horford a big contract, but now he’s back after stints in Philadelphia and Oklahoma City and expects to be a key contributor.

Ime Udoka, who is asymptomatic, was in his 10th day of isolation on Monday and will be available for the start of camp on Tuesday.