After two successful seasons with RB Leipzig, Nagelsmann, who turns 34 later this month, has taken charge of Bayern, replacing Hansi Flick, who is Germany's new head coach.
Champion Bayern Munich has a lower limit of 20,000 fans at its home games because of concerns of the spread of the delta variant, the dpa news agency reported.
Bayern president Herbert Hainer confirmed the forecasted loss after so many games behind closed doors, but insisted "our ambitions have not diminished".
Borussia Dortmund starts its title challenge against Frankfurt on either August 14 or 15 and Leipzig visits Mainz the same weekend.
Choupo-Moting joined Bayern in October on a free transfer for one season after his contract with Paris Saint-Germain expired.
Rummenigge made the request to step down from his position on June 30, and not Dec.31 as originally planned, Bayern said in a statement on Tuesday.
Madrid said the 28-year-old Alaba agreed to a five-year contact. His official presentation will be after the European Championship where he will play for Austria, the club said.
The 23-year-old Englishman signed a four-year deal with the German champions, the team said Thursday.
Lewandowski scored in each of his last 10 league appearances, and clocked 41 goals in just 29 games altogether.
Lewandowski converted an early penalty in Bayern’s 2-2 draw at Freiburg and Poland forward matched Gerd Müller’s record from 1972. Bayern secured the title last weekend.
As part of his penalty celebrations, the Poland striker lifted his match shirt to reveal a picture of Gerd Mueller over the text "4ever Gerd".
Flick, 56, has long been considered the preferred candidate for the post of national coach by the German Football Association (DFB).
Leipzig's defeat on Saturday means it can no longer overhaul Bayern, which holds a seven-point lead before hosting Borussia Monchengladbach in the late game.
Julian Nagelsmann joined Leipzig in 2019 from Hoffenheim and led them to the Champions League semi-finals last season.
Leipzig cut the gap on Bayern to seven points with three rounds remaining and can mathematically still win the title if Bayern follows its surprise 2-1 loss at Mainz with a collapse.