Nuggets coach George Karl said before Wednesday night's game in Boston that the Celtics are the best team he's seen on film this season.

"On video, they are the best team I've seen so far," Karl said. "They execute."

Karl pointed out that he's really only watched film of the teams Denver has played this season.

Of the league's contenders, the Nuggets have faced the Jazz, Hornets, Mavericks, Bulls and Lakers.

Denver hasn't faced San Antonio, Orlando or Miami.

"I'd probably put them No. 1," Karl said when asked specifically where he'd rank the Celtics.

"I don't go out of my way to watch film of teams I'm not preparing for."

Boston entered Wednesday's action with a record of 16-4, the best record in the Eastern Conference and second in the league to only San Antonio and Dallas.