50% chance that Kevin Garnett will play in Monday's Miami Heat game

 Kevin Garnett was unable to practice on Sunday, and according to Doc Rivers, there is a 50% chance he will play against the Miami Heat.

From Celtics.com:

Garnett, who missed Saturday night’s game against Charlotte with a left adductor strain, did not improve much overnight. Doc Rivers told reporters that he will not play Garnett until he is certain that the injury has healed. 

“It’s just a point of the year where you’re just not going to play him if he’s not feeling great,” Rivers said.

This injury will not require surgery but it will require time to recover. As a result, the likelihood of Garnett playing Monday night against the Heat is not very good. Rivers said on Saturday that, “If he’s healthy, he’ll play, and if he’s not, he will not.” The fact that KG was missing from the C’s for a second consecutive day would lead one to believe that he isn’t going to bounce back by the time tip-off arrives at 8 p.m. on Monday.

“We don’t know what he’s going to do tomorrow,” said Rivers. “My guess is 50-50, at best.” 
This does not bode well for the Celtics' chances to beat the Heat if KG is out of the line-up, but that being said, the San Antonio Spurs nearly defeated the Heat with Tim Duncan, Tony Parker, and Manu Ginobili sitting, so anything is possible (as KG would say).