Gustavsson (undisclosed) won't start Sunday's home game against Vegas, according to Michael Russo of The Athletic.
Gustavsson will be evaluated further for what is believed to be a minor injury, making him unavailable to make his scheduled start. He has a 14-5-3 record with a 2.24 GAA and a .922 save percentage in 22 appearances this season. Jesper Wallstedt will get the nod after Marc-Andre Fleury played in Saturday's 4-1 win over Philadelphia.