Bayern Munich manager Pep Guardiola blamed his team's Champions League quarter-final first-leg defeat by Porto on injuries. Porto take a two-goal advantage to Munich next Tuesday for the return leg of the last-eight clash after punishing a sloppy Bayern with two early goals from Ricardo Quaresma and a second-half effort from Jackson Martinez. Guardiola said: 'We have players who were out a long time with injuries ... their legs don't last very long. It's a tough result to take into the second leg, but we'll give it a go.' Pep Guardiola says his side suffered with the injuries they are currently contending with in the squad . Porto manager Julen Lopetegui said his side can now dream of reaching the semi-finals, but they will need to be 'perfect' in the second leg. 'Now we have produced a situation for ourselves where we can dream, knowing that we will need to give everything we have got to get through,' Lopetegui, a former Barcelona team mate of Guardiola, told reporters. 'We will need to produce a perfect performance in Germany next week to progress.' Julen Lopetegui says reaching the Champions League semi-final would be a dream come true . Ricardo Quaresma (7) gave Porto an early lead from the spot but Manuel Neuer was lucky to be on the pitch . Lopetegui said the return from injury of goalscorer Martinez, who had been out since early March with a hamstring problem, was one of the reasons for Wednesday's victory. 'With him back in the attack, we were able to press Bayern with some force and give them real problems,' he said. Martinez, who capitalised on an error by Jerome Boateng in the 65th minute to round Bayern keeper Manuel Neuer for Porto's third goal after Thiago Alcantara had reduced the arrears, said he was not yet 100 percent fit. The striker was a constant menace for Bayern's defenders and his tenacious harrying was rewarded after three minutes when he robbed Xabi Alonso before being brought down by Neuer for a penalty that Quaresma converted. Jackson Martinez (right) rounds Neuer to slot home Porto's third goal and put them in control . Martinez troubled Bayern throughout and tackled Xabi Alonso (right) in the build up to the penalty . It was a similar story for Porto's second goal when Quaresma picked the pocket of Dante before beating Neuer with a clever finish on 10 minutes. 'It was fundamental that we tried our best to impose ourselves on Bayern and not give them a chance to settle,' Martinez said. Quaresma also sought to heap praise on Porto's team ethic, saying hard work had proved the difference between the two teams. 'There are no stars here. We all work hard for our results,' the forward said. 'The win is more important to us than the display. We have all worked extremely hard to get this win to give ourselves something to defend in the second leg.' Quaresma scores Porto's second inside 11 minutes as they took advantage of a depleted Bayern Munich .
Pep Guardiola blamed injuries for his side's disappointing defeat to Porto . Bayern Munich's players were guilty of poor individual errors for the goals . Porto boss Julen Lopetegui is now dreaming of a semi-final place .