Smith, Horford return for Atlanta in Game 4
Smith missed Game 3 with a strained tendon in his left knee but was in the starting lineup. Horford, who had not played since Jan. 11 with a torn left pectoral muscle, came off the bench.
The Celtics had Ray Allen back for the second straight game after he missed almost a month with bone spurs in his right ankle. Guard Avery Bradley was in the starting lineup one game after dislocating his shoulder.
Updated May 6, 2012