Real Madrid director Emilio Butragueno says Jose Mourinho faces "a challenge" to get it right in Madrid.
Real still need to settle compensation with Inter Milan for Mourinho.
"Mourinho has had a successful track record with multiple teams and knows how to get a performance with each team he has," sad Butragueno.
"He has demonstrated his ability, that's certain, but it's true that Real Madrid has huge demands and it will be a challenge. I hope he will be lucky and do well."