Coach Ted Nolan said Neuvirth complained of a lower body injury during warm-ups before the Sabres' 4-1 loss at the New York Islanders on Saturday. Nolan listed Neuvirth day to day, but said it was too early to determine whether he'll join the team when it opens a five-game road trip at Calgary on Tuesday.
Neuvirth stopped 51 shots in a 4-2 loss at Carolina on Thursday. The Sabres acquired him in a trade with Washington on March 5.
Lieuwen was set to serve as Jhonas Enroth's backup against Montreal. He has a 17-11-2 record with AHL Rochester this season.