Diego Lopez is expected to be in goal when Real Madrid play host to city rivals Atletico Madrid in a repeat of last seasons Copa del Ray final, which finished 2-1 in favour of Los Rojiblancos.
Madrid were lucky to come away with three points against Elche in midweek - a controversial penalty was scored by Cristiano Ronaldo in the dying seconds of the game.
The goalkeeper is well aware of the difficulty of the task facing Madrid and insists his side cannot afford to slip up especially at the Bernabeu.
Lopez said on the Bwin website: "The derby is a game of maximum rivalry and we are really looking forward to it. You can really feel the passion and the fighting spirit in these matches. It’s a game where we have to battle, give it one hundred per cent and come away with the three points.
"In Real Madrid it’s all about winning, we can’t slip up in any game and especially when we’re playing at home. Every game is different for me and I try to be consistent. It’s a crucial match, but so was the one against Elche and all the others."
The 31-year-old keeper was brought back to his boyhood club by Jose Mourinho during his last season at the club for €3.5 million from Sevilla to replace Iker Casillas who suffered a hand injury.
New manager Carlo Ancelotti has kept faith with Lopez for La Liga games despite club icon and fan favourite Casillas back to full fitness.
The former Villarreal and Sevilla keeper hopes his side will be able to take advantage of any weaknesses Atletico may show during the derby game on Saturday.
“We’re up against a great side and if they play their best cards they are very dangerous. The greatest danger is that they are a very closely knit group, they’re all in it together and they know exactly what they’re doing," said the Spaniard.
We have to exploit any little weaknesses they may have and rely on the quality of our team and our style of football to try and come away as winners."
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