By Gary Washburn, Globe Staff

INDIANAPOLIS -- Celtics coach Doc Rivers said this morning that Avery Bradley will start tonight against the Indiana Pacers and Ray Allen will come off the bench. Bradley may have his toughest challenge as a starter in opposing Indiana swingman Paul George, who is 6-feet-8.

Also, the Celtics went over film of the Chicago game and Rivers said the players noticed their slippage in the second half. Rivers said he was not going to harp on his postgame comments Thursday night but his team needs to respond with a better effort tonight.

Rivers said he wasn't sure if Mickael Pietrus began his concussion tests but the Celtics are hoping to get him back for the postseason.