Bayern Munich had to make do without FOUR important first-team stars as Pep Guardiola's side attempted to overturn a 3-1 deficit against Porto on Tuesday night. Injured quartet Franck Ribery, Mehdi Benatia, David Alaba and Arjen Robben were forced to watch on from the sidelines as the German giants bid to reach the Champions League semi-finals. However, the absence of Robben and Co appeared to make no difference as Bayern raced into a 5-0 lead at half-time before claiming a 6-1 victory to win the tie 7-4 on aggregate. Injured trio Franck Ribery, Mehdi Benatia and David Alaba chat ahead of Bayern's clash with Porto . Injured Ribery acknowledges a steward before taking a seat at the Allianz Arena on Tuesday night . Ribery looks on as former Roma defender Benatia chats with the France international in the dugout . While Ribery, Benatia and Alaba chatted in the home dugout ahead of kick-off, Holland international Arjen Robben was in front of the mic doing some punditry alongside Bayern goalkeeping legend Oliver Kahn. Ribery missed the game after failing to recover from a recent ankle injury while former Roma defender Benatia faces another two weeks out with a groin problem. Robben was unavailable for the encounter with an abdominal injury. David Alaba, meanwhile, is set for a month on the sidelines having partially ruptured knee ligaments playing for Austria at the start of April. Bayern had just 14 fit players to choose from against Porto in the first leg but tore the Portuguese giants apart at the Allianz Arena to progress. Holland international Arjen Robben was pictured doing punditry alongside Bayern legend Oliver Kahn (right) Bayern Munich wideman Robben was unavailable for the Champions League clash with an abdominal injury .
Bayern Munich beat Porto 6-1 at the Allianz Arena on Tuesday night .
German giants were without Franck Ribery, David Alaba and Mehdi Benatia .
Arjen Robben was also sidelined and did some punditry for the tie .