It's hard to tell from the numbers. The Celtics were a minus-9 in Game 1 when Jeff Green was on the floor, then a plus-5 in Game 2 when he made 4-of-6 shots and scored 11 points. But he has had a tough time on the eye test. Green has looked all out of sorts when trying to check LeBron James in relief of Paul Pierce. When he was acquired, Green's main tasks were to play well enough so Doc Rivers could avoid running Pierce into the ground in the regular season, and to be of defensive assistance in the playoffs. His offense would be a bonus. Had Marquis Daniels not been injured, maybe Green's not even here. But he is, and he knows he has to be better on LeBron as the series shifts to Boston. "It's been a good challenge," Green understated following yesterday's practice. "I mean, he's one of the best players in this league. It's a good opportunity for myself to try to, you know, shut the best player in the league down. It's a team effort though. It's not really an individual thing.