Porto coach Jesualdo Ferreira feels the absence of Arsenal captain Cesc Fabregas will not change the way the Gunners tackle Tuesday night's crunch Champions League clash at Emirates Stadium.
The influential Spain international suffered a reoccurrence of a hamstring problem during the 3-1 Barclays Premier League victory over Burnley on Saturday. French international Samir Nasri is likely to be moved into the centre alongside Cameroon international Alex Song, who is currently serving a two-game domestic ban.
"Success always depends on the collective team, every player is part of that," said Ferreira, whose side will defend a 2-1 lead from the first leg. "Fabregas not playing will not change the way Arsenal face this match. We can expect a very strong Arsenal."
He added: "The match will probably be decided by small details - Arsenal are very good in dealing with these, but we will focus on our own strength."
Porto have lost all six of their trips to London - including a 1-0 loss at Chelsea in this season's group stage - and went down 4-0 to the Gunners during September 2008.
However, Ferreira believes Tuesday night's encounter will be different.
Porto have plenty of options in attack, with Colombia forward Falcao, Argentinean Marian Gonzalez, Uruguay's Cristian Rodriguez and Brazil international Hulk all pressing to be included in the three-man frontline.
"We know what our qualities are and we are confident," Ferreira said. "This will be a very difficult match, but we have the weapons which make it tough for Arsenal.
"You need to be able to adapt tactically, but we are always playing to win.
"We will try to do the same what we did at Estadio do Dragao."