BOSTON -- Celtics reserve shooting guard Ray Allen said his ailing right ankle hindered him more than usual during Boston's Game 6 triumph over the Atlanta Hawks and admitted his availability is day-to-day moving forward into the next round.

Allen missed six of the seven shots he took in Thursday's game, chipping in 7 points and 5 rebounds over 26:29 in Boston's 83-80 triumph that ended the Hawks' season. Boston opens a conference semifinal series with the Philadelphia 76ers on Saturday night with Game 1 at TD Garden.

"(The ankle) bothered more tonight than it had the previous couple games," said Allen. "I didn’t have the confidence on it. Right now, it bothers me, but I have a day (Friday) to deal with it."

Might Allen miss a game if the pain lingers?

"I never rule myself out," he said. "I think it’s a day-to-day situation for me."

Allen previously noted, "Today wasn’t a great day. I struggled with (the ankle). (Wednesday) was a transition day, but coming in (Thursday), it was a little tougher. I just worked through it."

Maybe the most surefire sign that Allen simply isn't feeling right: He missed a pair of free throws during Thursday's game.

"I won’t say (the injury) affects my free throw shooting," said Allen. "I think it just affects your whole confidence on the floor -- running around, moving around, not having your leg underneath you."

Allen said his rhythm "felt a little suspect. I’m still working on it. Every day is a new day. I always love the challenge."