DENVER -- The Denver Nuggets were without their two leading scorers for the second straight night.
Billups injured his left groin against Houston on Dec. 16 and has missed six of the last seven games. He played the first half against Portland on Dec. 25 and scored 10 points in nearly 20 minutes.
Anthony, second in the NBA in scoring at 30 points a game, will miss his second straight game.
Anthony said after the game his injury was more serious than first thought and he doesn't know if he will play Tuesday against Golden State.
"I'm hopeful," he said. "I think it was worse than a lot of people expected."
Denver's rotation got even shorter when reserve forward Chris Andersen left the game with a sprained ankle midway through the second quarter and did not return.
"You've got your leading scorer down, your leader, and now your energy guy," guard Ty Lawson said. "It's tough."
Andersen left the Pepsi Center in a walking cast. Coach George Karl said Andersen would probably sit out Tuesday and against Cleveland on Friday.
"He'll probably be out this week, but we'll know more tomorrow," he said.
Information from The Associated Press was used in this report.