Porto secured their spot in the last 16 of the Europa League on away goals on Thursday after a 1-0 defeat to Sevilla at the Estadio do Dragao.Porto, holding a 2-1 lead from last week's first leg in Spain, looked in complete control of the return meeting until a two-minute spell midway through the second half threatened to undo all their good work.
First, Sevilla substitute Luis Fabiano scored against his former club to give the 2006 and 2007 UEFA Cup winners a lifeline, and then 60 seconds later Porto were reduced to 10 men when Alvaro Pereira was shown a straight red card.
The runaway Portuguese league leaders suddenly looked in serious trouble, but Sevilla lost their man advantage five minutes later when centre-back Alexis was dismissed for a second yellow card, and the visitors could find no way through in the closing stages as they exited the competition.
Sevilla considered themselves unlucky to lose the first leg after playing well but going down to an 85th-minute goal, and Gregorio Manzano's side looked fired up from the start tonight with Frederic Kanoute sending a shot just wide in the third minute.
However, that was as good as it got for the Primera Division outfit in the first half as Porto gradually stamped their class on proceedings.
Fernando Belluschi fired a thunderous 30-yard effort just wide while Sevilla goalkeeper Javi Varas denied Alvaro and Hulk in the opening 45 minutes.
Porto also hit the woodwork prior to the break when the fit-again Falcao, this season's leading scorer in the Europa League, was unlucky to see a superb header come back off the crossbar with Varas well beaten.
It was a similar story after the break with Belluschi, Falcao, Hulk - twice - and Joao Moutinho going close before the hosts were stunned when their former player Luis Fabiano put Sevilla ahead.
The Brazil international, who had only been on the pitch for 15 minutes, latched on to a good through-ball from Alvaro Negredo, held off his marker and thumped his shot past Porto goalkeeper Helton.
That still left Sevilla needing another goal to save themselves, but their hopes received a further boost moments later when Alvaro was dismissed following a crunching challenge on Gary Medel after losing control of the ball.
Sevilla barely had time to make the most of that sending-off before they too lost a player, with Alexis picking up a second yellow for tugging back the dangerous Hulk.
The away side pushed hard in the closing stages and Kanoute headed wide while Jesus Navas' cross just failed to pick out the unmarked Diego Perotti in the middle.
However, it was Porto who looked the more likely scorers as Sevilla left gaps at the back, but Hulk, who had numerous openings, and his team-mates could not find the goal that would have prevented a first European defeat in nine matches under coach Andre Villas-Boas.
The misses did not prove costly though as Porto held on for an away-goals triumph that sets up a last-16 showdown with CSKA Moscow.