Neuer, who had missed the 1-1 first leg draw in Austria, has been out for a month after undergoing knee surgery in February. His services will be in high demand on Tuesday with Bayern desperate to stay in contention for the European silver medal.
“If there is no knee reaction, he will be able to play,” Nagelsmann told an online news conference. “We know how important he is as a player and a person for Bayern. I am happy that he is back and I hope he will play tomorrow.”
Bayern are heavy favorites to reach the quarter-finals but are under pressure to advance following their last-gasp draw to avoid defeat in the first leg.
A rule change this season means that ties that are level after the second leg will go to extra time and penalties, regardless of the number of goals scored away from home.
Bayern are nine points clear at the top of the Bundesliga but made a mistake with a 1-1 draw at home to Bayer Leverkusen on Saturday and are also out of the German Cup.
“Obviously we know it’s an important game for us,” said Nagelsmann, in his first season at Bayern. “If we don’t get a positive result, it’s clear that it won’t be a special season.
“But I don’t expect us to be eliminated. I’m justifiably hopeful that we will move forward and that should be our demand and we have to deliver the performance to match that. We need to keep up the pace for the full 90 minutes.” .”
The Bavarians last won the Champions League in 2020 en route to a run of six titles.