The German champions will be without the talented winger when they take on BVB at Allianz Arena in midweek.
Hoffenheim v Bayern Munchen: Champions' 32-match unbeaten run ends as Kramaric, Dabbur inspire hosts
Hoffenheim have ended Bayern Munich's 32-match unbeaten run, inflicting on them a first loss in any competition since December.
Hansi Flick's Bayern Munich needed extra time to see off Sevilla in the Super Cup, but substitute Javi Martinez earned them a 2-1 win.
Borussia Dortmund winger Jadon Sancho left with his team for a pre-season training camp in Switzerland on Monday with the German club saying the talented player would stay after a contract extension to 2023.
The protocol will be much different than normal should spectators be allowed back in stadiums in September.