Boston Celtics president of basketball operations Danny Ainge spoke with free-agent center Kevin Garnett last week, though Ainge said Garnett hasn't made a decision on his future.

Garnett, 36, is pondering retirement despite finishing strongly in his 17th season. He needs time to reflect, putting Boston's offseason plans in an uncertain state.

"Kevin and I had a good conversation last week and the conversation was mostly on how he needs time before he makes that decision," Ainge told Boston sports radio station WEEI-93.7 FM. "I think we'll talk within the next week, but I'm not so sure that's a decision day for him. He may want to wait and see what sort of team we have. I'm not sure.

"I know that he wants to come back. I know he likes Boston, and I know he loves playing for (coach) Doc (Rivers). He loves everything about the team and the city and so forth. I think that his decision will be, 'Do I really want to play? Or do I not want to play.'"

The longer Garnett delays, the more difficult Boston's situation becomes, with the NBA draft later this month and cap space allocated in holds for Garnett and Ray Allen when free agency opens in early July.

"It is complicated and the timing is complicated. Juggling all these different scenarios is difficult," Ainge said. "But the reality is that, on July 1, Kevin Garnett is on our books for $21 million until we either sign him to a new contract, or renounce him, which means we can't re-sign him. Otherwise, it really limits our cap space."