The Detroit Pistons held off a late Boston Celtics run to end summer league action on a winning note, 73-69.

The Celtics outscored the Pistons 20-17 in the fourth quarter, but could not get key stops down the stretch.

Alex Acker led the Pistons in scoring with 18 points (7-16 FG) and four rebounds. Jason Maxiell added 17 points (6-14 FG, 5-12 FT), while Darko Milicic chipped in eight points (2-8 FG) and seven rebounds.

Detroit finished the game shooting 44 percent (24-55 FG), while Boston finished the game shooting 41 percent (23-56 FG).

Tony Allen continued his summer league brilliance by pouring in 29 points (10-15 FG, 9-12 FT). Ryan Gomes added 16 points (7-10 FG) and seven rebounds in the loss. Starting Celtics Al Jefferson (1-8 FG), Justin Reed (0-4 FG) and Will Bynum (0-6 FG) were a combined one for 18 shooting.

The Celtics finish with a 4-2 record.