Let's not beat around the bush here. Bayern Munich have been decimated by injuries this season. Nearly every player has missed a game or two due to injury this season, and a few of them have been out for a month or more at a time. The fact that Bayern have made it to this stage in the competition is a testament to the depth that has been added to this squad over the last few years.
The good news for Bayern fans is that, despite missing training on Monday to deal with minor knocks, both Manuel Neuer and Thiago Alcantara will be available for Pep Guardiola to select in his starting eleven. Neuer, unquestionably the world's number one goalkeeper, will need to be his normal elite self to stop Barcelona from finding the back of the net. While there is some debate as to whether he'll be in the starting lineup, Thiago's creativity demands that he find his way into the game.
Bayern revealed a wildcard on Monday afternoon with the news that Sebastian Rode had returned to team training. Rode's versatility makes him an interesting tool for Guardiola to pull out of his tool box. He's probably not 100% after recovering from a hamstring injury, but don't rule out a second half appearance from Rode.
Unfortunately, the injury list remains quite long. Franck Ribery, Arjen Robben, David Alaba, and Holger Badstuber will definitely miss Tuesday's match with Barca with various injuries.