The good news for the Celtics is that Glen Davis has shown improvement after suffering a concussion in Game 5 of the Eastern Conference finals. The news is not so promising on Marquis Daniels, who also had a concussion. Rasheed Wallace, meanwhile is still struggling with back spasms.

First, the positive news for the Celtics. Doc Rivers said on a conference call with reporters that Davis was looking better and that he was undergoing tests this evening with the team doctors.

“He didn’t have any headaches today,” Rivers said. “He had some last night, he didn’t have any today, which is a big step. All of it will be a game-time decision, so we’ll have to wait and see.”

Daniels, meanwhile, is not so fortunate and it’s looking doubtful that he will be ready for Game 6 Friday.

“Marquis is not doing as well as Baby,” Rivers said. “I would actually say right now that he won’t be ready.

Then there’s Wallace who had his back tighten up during the game. Rivers sounded cautiously optimistic about Wallace’s availability, although he did have a rough morning.

“Rasheed is doing better,” Rivers said. “It was not going well at all today. We watched some film before we got on the plane and he couldn’t sit down, but he’s doing better [now].”

All three are said to be game-time decisions. Brian Scalabrine is the one player on the roster with NBA experience who has been mostly inactive during the playoffs. Scalabrine was activated for Game 2 of the series with the Magic after Shelden Williams had a back spasm.

Oliver Lafayette and Tony Gaffney, who were signed at the very end of the season, are the other two options in a worst-case scenario.