The Celtics rested their four big guns Monday night, lost to the lowly Wizards and officially inherited the Knicks in the first round, likely beginning Sunday in Beantown. Chauncey Billups wonders if the Celtics may one day regret it.

Be careful what you rest for.

"Yeah, I think we are certainly the most dangerous first-round team in the NBA," said Billups, who scored 10 to go with eight assists in last night's 103-90 loss to the Bulls at the Garden. "We got a lot of weapons and we can move the scoreboard. Our defense has gotten a lot better. We're going to be a tough team, a tough out."

The "Blood Feud" between the Knicks and Celtics resumes Sunday after a 21-year postseason hiatus. The defending Eastern Conference champions are the distinct favorites, but the Knicks are the crazy wildcard whose Big Apple 3 have struck fear around the NBA.

Before last night's game, owner James Dolan, architect of the Carmelo Anthony blockbuster, was in a chipper mood, shaking Knicks president Donnie Walsh's hand briskly 90 minutes before tip-off as they chatted. Walsh said his team can't be considered arch-rivals of the Celtics until it knocks them off in the playoffs.

"We're two of the longest-tenured franchises, but those rivalries are engendered by the teams playing right now," Walsh said. "There was one rivalry way back. But the rivalry will have to come in the playoffs. For us, we have to beat them. We have to beat them once to be considered that."