Celtics head coach Doc Rivers says that Ray Allen is "50/50" and will be a game-time decision for Sunday's Game 1 between Boston and Atlanta.

Doc Rivers dubbed Ray Allen 50/50; said if he's able to get through pregame routine, he thinks he'll play (was unable last two times)

— Chris Forsberg (@ESPNForsberg) April 29, 2012

Chris Forsberg reports that Allen will attempt to go through his pregame routine and if he is successful then he would likely come off the bench for Boston in Game 1. Allen however has been unsuccessful his last two times out at getting through his pregame routine.

Allen is battling an ankle injury that will require surgery once the playoffs are over and the Celtics' season comes to an end.

For more on the Hawks-Celtics playoff series check out Peachtree Hoops and CelticsBlog. For more news and notes regarding the NBA Playoffs head over to SB Nation's NBA Basketball page.