Sublime Choupo-Moting assist for Sane makes it 3-0 Bayern
Alphonso Davies nods home header vs. Mainz
Musiala doubles Bayern's lead with rasping finish
Brilliant Cancelo cross sets up Choupo-Moting for Bayern's opening goal
Bayern cruise into German Cup last eight
Bayern Munich crushed hosts Mainz 05 4-0 on Wednesday to book their spot in the German Cup quarter-finals with their first win of the year.