But he wouldn't mind a win against his old friends.
"I'm 0-5 since I've been here, so I'd like a win," said Jefferson. "It's always good to come back to Boston. The fans show me a lot of love and I've got a lot of love for them. It'll be good to play on a court like this against a team like this."
Sounding a little bit like the player he was traded for, Jefferson said his knee is improving each day after surgery for a torn ACL he suffered at the end of last season. Jefferson said he's had good days and bad days, but that he's really starting to feel his rhythm come back the past eight or nine games.
Jefferson is averaging 16.8 points, 9.1 rebounds and 1.9 assists per game this season.
He knows he'll have to be in top form for Sunday night's matchup with good friend Kendrick Perkins. He dubbed it an old-school "48-minute practice," as the two resume a friendly rivalry. Jefferson heaped praise on Perkins' offensive development this season.
"[Jefferson and some friends] were talking about that last night, how much his confidence has picked up on offense," said Jefferson. "The way he's playing, he has a chance to make an All-Star game."
Asked if the two had talked yet, Jefferson joked, "We'll get all the talking in on the court [Sunday]."