The Celtics should have forward Kevin Garnett back in 10 to 14 days, according to coach Doc Rivers.

Garnett resumed workouts on Monday afternoon.

Rivers said the forward had been inactive aside from some light shooting since Dec. 28, but he worked out on an exercise bike and ran on Monday.

Garnett has missed Boston's last six games with a hyperextended right knee.

"I'm pretty sure [Garnett will return] in the next 10 days," Rivers said. "He started working out today for the first time, now it's just a conditioning thing. We want to make sure he gets strong, gets back in shape. He literally hasn't done anything. We figure about 10 days to two weeks, but I figure it's more like 10 days with him. Trying to hold him down for those extra four would be extra difficult."