Manchester City striker Sergio Aguero has revealed he gets butterflies in the build-up to big matches as the Argentine prepares to take on Liverpool in Sundays Capital One Cup final at Wembley.Aguero has competed in a number of major finals for club and country during his illustrious career, including the 2010 Europa League with Atletico Madrid, the 2014 League Cup with City and the 2014 World Cup and the 2015 Copa America for his country.But despite playing at the very top of the game for several years, the forward still gets nervous in the days leading up to showpiece events - at least until the first whistle sounds. Sergio Aguero has played in many big games, including the 2014 World Cup final The butterflies are always there, Aguero told Sky Sports. Thats normal in any game. When it is a final, you just want to get the preparation over and play.Obviously you are wanting to do well, but as soon as you are out on the field that anxiety tends to go away once you start enjoying yourself in the game. Once you get on the ball, the nerves go.I like to have the same mental approach as when I was a kid. I like to enjoy it, whether it is training or a game. It is important somebody still has to win and lose, but the main thing is to enjoy it and that is the kind of attitude I take into training and into games. We will be going all out for some sort of revenge and hopefully we have learnt from that and will get our own back in the final Sergio Aguero Once Sundays encounter with Liverpool gets under way, Aguero says he will approach it like he does any other match in an attempt to relax himself.I try to play a normal game, forget it is a final, and do not make any special plans, he said. However, it is a funny one as sometimes the team that plays the worst in a final ends up winning.What it is all about is eliminating individual errors, ironing out mistakes as they can be costly in games. There is no forgiveness in finals like there can be in the lea