The Celtics’ transformation into a true contender may have taken longer than expected and there may be more obstacles as the season progresses, but president of basketball operations Danny Ainge said Sunday that he is content with the roster.

Ainge has been scouting college games during the Celtics’ five-game winning streak, watching the rapid improvement of his team’s bench, the spark provided by Avery Bradley, and the improved defense over the past 10 days. With two available roster spots, the Celtics could make an addition, but Ainge said there is no guarantee he will make a deal.