The Bundesliga leaders take on Sevilla at the Estadio Ramon Sanchez Pizjuan on Tuesday but they will have to do it without their Austrian defender.
Alaba sustained a back injury leading up to the match and has failed to shake off the nerve problem, meaning he is forced to watch the first leg from the sidelines.
Juan Bernat takes his place in the starting XI but there was no place for James Rodriguez either, who was instead named on the bench, as head coach Jupp Heynckes opted for a more conservative lineup.
April 3, 2018