Although Boston Celtics team president Danny Ainge has stated that Doc Rivers will return to coach Boston next season, Rivers believes it "may be time for a change," according to a source close to the situation.

"Doc loves coaching," the source told ESPN. "He loves coaching in Boston. But he feels it may be time for a change."

Rivers, who has been attending the Celtics' pre-draft workouts, is unsure of what he wants to do and has not yet ruled out returning to Boston for a 10th season. He has a very close relationship with Ainge, and the source said that is one factor that is making his decision so difficult.

If Rivers were to walk away from the three years and $21 million remaining on his contract with the Celtics, it is not clear whether he would seek another coaching job next season or sit out and possibly return to broadcasting.

If Rivers became available, he would immediately become the most coveted coach on the market. The Brooklyn Nets and Los Angeles Clippers asked for permission to speak with Rivers about their coaching jobs last month, but Ainge refused to grant it.

There is a feeling throughout the league, however, that because of the closeness of their relationship, Ainge would allow Rivers to leave and go elsewhere if the coach requested it.