Barcelona returns to La Liga action on Sunday with a trip to relegation contender Athletic Bilbao.
Muniain followed Mikel San Jose off the Bilbao bench just past the hour, before Barcelona made their first adjustment of the match, Carles Alena taking the place of Vidal in the middle of the park. Raul Garcia's finish was blocked and Mikel San Jose's effort whistled inches outside of the post.