Porto's defence was not the only thing to be ripped apart at the Allianz Arena on Tuesday night as a jubilant Bayern Munich manager Pep Guardiola was left with a hole in his trousers. Guardiola managed to tear the left trouser leg of his grey garments during an incredibly exciting night for Bayern, who led their opponents 5-0 at half-time. The Spanish tactician's underwear was on show after the incident, and he joked after the Champions League clash: 'I'll have to buy new ones for the next match.' Bayern Munich manager Pep Guardiola ripped a hole during the Champions League match in Germany . Guardiola's underwear were on show after the Bayern boss managed to rip a small hole in his trousers . The excitement of a 6-1 win against Porto appeared to get the better of Guardiola's left trouser leg . Away from Guardiola's clothing, Bayern managed to book a place in the Champions League semi-finals thanks to goals by Thiago Alcantara, Jerome Boateng, Thomas Muller, Xabi Alonso and a brace from Robert Lewandowski. Porto went into the match with a two-goal lead following their 3-1 victory in Portugal, however they were swept aside by the Bundesliga giants. Bayern's European rivals will be running scared after their outstanding display as Guardiola's side showed they were a cut above a shell-shocked Porto side. Guardiola's trousers before the rip (left) and after the rip (right) during Bayern Munich's 6-1 victory over Porto . The former Barcelona boss (far right) also decided to ditch his suit blazer during the latter stages of the match . Bayern Munich celebrate at the final whistle after booking a place in the semi-finals of the Champions League .
Bayern Munich boss Pep Guardiola ripped a hole in his trouser leg .
His underwear were on show during the European match in Germany .
The German giants booked place in the semi-finals thanks to 6-1 rout .