Coming off an impressive performance in a Game 2 rout of the Cavaliers, the Celtics suddenly have some new concerns. Mainly, the healthy of Kevin Garnett and Kendrick Perkins, both of whom missed practice Wednesday. Garnett has a right mid-foot sprain while Perkins has a hyperextended right knee. Garnett's injury is the one that appears to be more serious. "Honestly, [Wednesday], if we had a game I don’t think he could have played," coach Doc Rivers said. "We just have to wait. I doubt if he’ll practice [Thursday]. We’ll see.