Bayern Munich's hopes of winning the Champions League have suffered a severe blow after the club confirmed that striker Robert Lewandowski has sustained a broken jaw and nose and winger Arjen Robben is ruled out for the rest of the season.

Lewandowski scored the opening goal in Tuesday's DFB Pokal semifinal against former club Borussia Dortmund at the Allianz Arena, but was injured in a collision with goalkeeper Mitch Langerak with four minutes of extra time remaining.

The Poland international was not substituted, with Bayern having already made three changes, but he was a notable absentee from the ensuing penalty shootout which his side lost 2-0 after failing to convert any of their four spot kicks.

Lewandowski scored the opener against Dormtund in the DFB Pokal semifinal. Boris Streubel/Getty Images

Lewandowski was sent to hospital for a CT scan after the match, and on Wednesday morning the club announced his injuries but stopped short of ruling him out for the rest of the campaign.

Robben, however, will not feature again this season. The Netherlands international had not played for a month before coming off the bench on Tuesday, but went to ground clutching his calf just minutes later.

The club confirmed on Wednesday that he would not play again this season after suffering a torn calf muscle.

Attention #FCBayern fans. You might wanna sit down. Here comes the official injury news regarding #Robben and @lewy_official... - FC Bayern English (@FCBayernEN) April 29, 2015

Arjen #Robben has a tear in his left calf muscle. His season is over. - FC Bayern English (@FCBayernEN) April 29, 2015

Robert #Lewandowski has broken his upper jaw and his nose. He also has a concussion. It doesn't get much worse than that. - FC Bayern English (@FCBayernEN) April 29, 2015

Bayern have already secured the Bundesliga title this season, and while their hopes of a Treble were dashed with domestic cup defeat to Dortmund they still have the Champions League to play for.

However, with manager Pep Guardiola's former club Barcelona standing between them and a place in the Berlin final on June 6, they will be without Robben and potentially Lewandowski for that semifinal.

Despite the severity of his injury, Lewandowski said via his Twitter account that hopes hopes to be fit for Bayern's first-leg trip to the Camp Nou on May 6.

Its a few more days till the match at Camp Nou, i really hope i will be able to play! - Robert Lewandowski (@lewy_official) April 29, 2015

Lewandowski has scored 23 goals in 43 competitive games this season, and set up a further 12. In the absence of wingers Robben and Franck Ribery, Lewandowski's form peaked in April, when he scored six goals in eight games.