It was the second straight game Anthony missed due to the injury.
Coach Mike Woodson said after the game that Anthony would not make the trip to Toronto for Saturday's game against the Raptors.
Anthony originally suffered a sprained left ankle Monday against the Orlando Magic.
"He's still day to day. Just getting treatment. I'm sure when he's ready to play, he'll let us know," Woodson said before Friday's game. "Obviously, the ankle's bothering him."
Anthony missed his first game of the season Wednesday against Oklahoma City as the Knicks (9-19) lost by 29 points. He is averaging 26.3 points per game and had led the team in scoring in all 27 games prior to Wednesday.
Udrih started in place of Raymond Felton, who is day to day with a right groin injury, according to Woodson.
Felton said he "felt a pop" after injuring his groin Monday. Woodson said the point guard, who has missed 12 games this season due to various ailments, continues to get treatment on his injury.
In other injury news, Metta World Peace suited up for the Knicks despite dealing with soreness in his left knee.
World Peace is scheduled to undergo a platelet-rich plasma procedure Jan. 6.
The procedure -- in which blood is drawn, spun in a centrifuge and injected into the knee -- is designed to heal the injury.
World Peace tore the meniscus in his left knee last season and had the knee drained five times this year, he said. But he elected to play Friday because the Knicks are short-handed.
"We're in a situation where we have to support each other and be there for each other," World Peace said.
The Knicks have dealt with injuries to several key players this season. In addition to those mentioned above, Chandler missed six weeks with a broken right fibula, Kenyon Martin missed five games with an abdominal strain, and Pablo Prigioni is out at least two weeks with a broken toe.
Woodson said he and the rest of the organization would like to see the how the Knicks can perform when fully healthy.
"I'm just anxious, my staff and I, to see where we are," the coach said. "I know if we do have a full deck, we got a chance to win basketball games. I truly believe that."