Montembeault allowed four goals on 39 shots in a 4-1 loss to the Sabres on Friday.
Two Buffalo goals in a six-minute span during the second period turned a 1-1 deadlock into a two-goal lead for the Sabres, who tested Montembeault with 29 shots at even strength. The 25-year-old netminder has a 3.65 GAA and .897 save percentage in eight appearances this season.