Bayern's quarter-final first leg success came in the middle of what coach Louis van Gaal has labelled the "weeks of truth" with their German championship chances essentially being decided in the next two games.
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"This win was hugely important for our confidence," said Bayern chairman Karl-Heinz Rummenigge.
"Now we should not think of the return leg next Wednesday but our minds should be just on Saturday."
The battling win against United, with Bayern coming back from a goal down to score twice in the second half, including Ivica Olic's last-gasp winner, sent a warning to their domestic rivals.
"We are still competing for three titles and I want to win all of them," Van Gaal said before the United match.
"We now have a chance to go past United," Van Gaal told reporters, quick to point out that Bayern are going into the Schalke match with no injury concerns.
Despite Bayern eyeing a last four place in the Champions League for the first time since they won the competition in 2001, the domestic title has been more on the coach and board's mind as van Gaal consistently played down his team's chances against United.
