Serge Gnabry faces a period on the sidelines after suffering a fractured forearm in Bayern Munich’s 4-0 DFB Pokal win at Preussen Munster.

The 28-year-old fell awkwardly in an early challenge and was substituted shortly after Eric Choupo-Moting fired the Bundesliga champions into a ninth minute lead.

Bayern later revealed the extent of Gnabry’s injury on their social media accounts, writing: “Serge Gnabry is confirmed to have suffered a fracture of the ulna in his left forearm.. following an X-ray examination during the match.”

Bayern boss Thomas Tuchel described the loss of Gnabry, who scored in his side’s Champions League win over Manchester United last week, as a “bitter blow”.

Tuchel confirmed: “Serge will undergo an operation tomorrow and will miss several weeks.

“It’s a bitter blow for him personally but also for us. He is an important player and a super character.”