Pep Guardiola was in no mood to celebrate as Bayern Munich secured their place in the semi-final of the German Cup with a 5-3 penalty shoot-out victory over Bayer Leverkusen on Wednesday. The Munich boss instead admitted his concern at the scoring touch which appears to have deserted his side in recent games, with the German champions only finding the net once in their last three matches. Guardiola believes the team is shackled by the absence of Franck Ribery and Arjen Robben. Bayern Munich manager Pep Guardiola is concerned about his team without Arjen Robben and Franck Ribery . Ribery (left) is absent with an ankle injury while Robben is out until May with a stomach muscle tear . 'Without Arjen Robben and Franck Ribery, we are a different team,' Guardiola said after the game. 'Of course we have big problems because we have no players for the one-on-one situations. We have other players and have to adapt the game for them.' Robben was ruled out for around two months with a stomach muscle tear at the end of March. Ribery has an uncertain timescale on his recovery from an ankle injury but is doubtful for the first leg of Munich's Champions League quarter-final tie against Porto. Munich's players celebrate after progressing to the semi-final of the German Cup . Thiago scored the winning penalty for Munich against Bayer Leverkusen as the shoot-out was won 5-3 . Guardiola will hope he can inspire his players to overcome the problem when they host Eintracht Frankfurt on Saturday in the Bundesliga, looking to maintain their 10-point advantage over Wolfsburg. The one goal Munich did score over their last three encounters came from Robert Lewandowski in the 1-0 win against his former club Borussia Dortmund and the two sides will meet again in the semi-final.
Bayern Munich have only scored once in their last three games .
They needed penalties to beat Bayer Leverkusen in the German Cup .
Guardiola feels Munich miss Arjen Robben and Franck Ribery .