Javi Martinez is set to be absent until February after suffering a "bad muscular injury" in Bayern Munich's 2-0 win over Wolfsburg on Saturday.
Bayern ultimately ended 2019 with a crucial win as late goals from substitute Joshua Zirkzee, who has now come off the bench to score in each of his first two Bundesliga appearances, and Serge Gnabry broke Wolfsburg's resistance at the Allianz Arena.
However, the reigning champions' success was marred by another injury blow, with Martinez forced to limp off clutching his thigh at the end of the first half.