Manchester City boss Roberto Mancini was delighted with their Europa League victory over Porto.
After Sergio Aguero gave them the lead inside the first 20 seconds, City's second came from substitute Edin Dzeko before the sending-off of Rolando preceded further strikes from David Silva and David Pizarro late on.
"It is not easy to beat Porto, they are one of the top teams in Europe and I am happy that we are going to the next stage."
City, who now await the winners of the tie between Sporting Lisbon and Legia Warsaw, also lead the Barclays Premier League by two points with 13 games remaining.
When asked about the double challenge, Mancini said: "We hope so but it is not easy.
"We want to try to go to the final if possible but it will be difficult because the Europa League has top squads - Manchester United, Valencia, Schalke - it is like the Champions League.
"For this reason it will be difficult but we want to try. After that the Barclays Premier League - we are top, and if we win the next 13 games we will win the league."Mancini said: "It was a good night but it was not easy. We had other chances to score but we didn't score, and when you don't score, you can have other problems.
