The 21-year-old forward was filmed dancing in central London at 2.37am on Saturday in a video uploaded to social media, according to The Sun, before playing 90 minutes on the Sunday.
Bayern Munich's players are primed for the second half of the Bundesliga season after a comfortable friendly win over SG Sonnenhof Großaspach on Tuesday.
CRAIG HOPE: Peter Beardsley is a Newcastle United legend, worshipped by supporters in the city. Even beyond his home town, he is considered one of the greatest players England has produced.
MATT LAWTON: In a bid to repair the damage left by the Eni Aluko discrimination storm, Wembley officials have responded with new initiatives on Tuesday.
MARTIN SAMUEL: Stoke are looking for a manager. They play Manchester United on Monday. That never happens at the FA. That is why they should always have led the way on the Rooney Rule.