Bayern Munich 6-1 Porto (agg 7-4): Lewandowski inspires stunning comeback

Two goals from Robert Lewandowski helped inspire Bayern Munich to a sensational 6-1 thrashing of Porto and seal their place in the Champions League semi-finals.

Trailing 3-1 from the quarter-final first leg, Pep Guardiola's side produced a devastating first-half display, scoring five times in the opening 40 minutes to leave the visitors shell-shocked.

Defensive errors had cost Bayern dear in the opening encounter, but it was their supreme attacking quality that came to the fore at the Allianz Arena.

Club doctor Hans-Wilhelm Muller-Wohlfahrt resigned in the wake of last week's reverse, claiming his medical team had been blamed for the defeat, but even without the absent trio of Bastian Schweinsteiger, Arjen Robben and Franck Ribery, Guardiola's team simply had too much for the 2004 winners.

Thiago Alcantara - who netted Bayern's away goal at the Estadio do Dragao - opened the scoring inside quarter of an hour and it was 3-0 before the 30th minute thanks to further goals from Jerome Boateng and Robert Lewandowski.

Thomas Muller's deflected effort made it four, before Lewandowski doubled his tally with a clinical finish as Porto failed to live with Bayern's movement and incisiveness.

With the job done for the Bundesliga champions, the second half proved a low-key affair, Jackson Martinez's goal 17 minutes from time proving nothing more than consolation, especially as there was still time for Xabi Alonso to curl home a late free kick following a tackle that saw Ivan Marcano sent off for his second booking.