The Reds take on Primera Division giants Real Madrid on Wednesday in the first knockout round of the competition and the former Atletico Madrid striker is hoping to get a good result against his former rivals.
The 24-year-old was part of the Spain side that lost out to Italy in World Cup 2006, and he is eager to avoid the same 'big game' upset.
Speaking to TheNews Of The World, Torres said, "If you ever need any incentive on the pitch to give all you have it is to remember how bad it feels to lose the big games and the feeling of emptiness in the dressing room afterwards.
"That's not something I want to be experiencing again and that is going to show on the pitch against Madrid.
"These are the games you look forward to as players. It is good to go back to Spain and, hopefully, one day I can face Atletico in the Champions League.
"Real Madrid's history in Europe is very clear but also Liverpool's history in Europe is very clear.
"The Premier League is still very important for us this season and is a competition we very much believe we are involved in but the European Cup is very important to the fans and players of this club and the manager has great success in it.
"We're not in the European Cup with a target of semis, the only reason Liverpool are in this competition is to win it."