BOSTON (CBS) – The Boston Celtics will try to snap the Miami Heat’s 22-game win streak Monday night at the Garden, but may have to do so without Kevin Garnett.

The Celtics center missed Saturday night’s win over the Charlotte Bobcats with a left adductor strain, which also kept him out of Sunday’s practice. Garnett will be re-evaluated leading up to the tilt, and Celtics head coach Doc Rivers put KG’s odds of suiting up Monday night at 50/50.

Read: Celtics-Heat Preview

“We don’t know what he’s going to do [Monday],” Rivers told reporters on Sunday. “My guess is he’s 50/50 at best.” 

Rivers downplayed the injury, saying his concern was only a one on a scale to 10. He doesn’t think Garnett will need to undergo an MRI, but there remains a chance he could miss more than a few games.

“I don’t think it’s that serious,” said Rivers. “It’s just at the point of the year where you’re just not going to play him if he’s not feeling great.”

Read: KG Sits Against Bobcats

Rivers said the Celtics will mostly employ a small lineup, with just one big man, against the Heat regardless if Garnett is in the lineup Monday night or not. So far this season, the Celtics are 1-1 against the Heat; losing opening night in Miami 120-107 and beating Miami in Boston last month 100-98 in 2 OT.

Garnett has played 63 games this season — missing just one game due to rest and one because of the adductor strain — averaging 14.8 points per game off 49-percent shooting and a team-high 7.8 rebounds.