The Real Sociedad coach believes Los Blancos are impossible to defend against, insisting his team must be flawless if they hope to leave the Bernabeu with points on Saturday
Los Blancos have scored 12 goals in their last three matches in all competitions and have struck 30 times so far in La Liga this season, although Carlo Ancelotti's side have received criticism of late given the eight-point gap to league leaders Barcelona.
Arrasate, however, laughed off suggestions of a 'crisis' at Santiago Bernabeu in Friday's press conference, telling reporters: "They battered Malaga then put seven past Sevilla. That says it all.
"They are a brilliant team with the best players in the world.
"In attack, they are unstoppable – and that's something which they have demonstrated not just once or twice but on many occasions.
"[Gareth Bale, Cristiano Ronaldo and Karim Benzema] are three great players who are very difficult to stop.
"We have to make sure we don't gift them anything, don't get caught on the break and don't give them space to run into – but even after that, they are still very difficult to contain.”
Sociedad have managed just one victory at the Bernabeu in the past decade, but Arrasate insists his side are confident after their 0-0 draw with Manchester United in midweek.
"Well, maybe it's our turn this time because we haven't won there in over 10 years. But everything is different now, things have changed," he said.
"I won't say that before it was easier to win there but I think today it seems much harder because the difference between us is greater.
"United and Madrid are completely different – Madrid are physical like United but they don't defend as strongly as United do although in attack, they have more clout."