Huntelaar joined the Spanish giants from Ajax for 20million euros on Tuesday.
“The loss of [Ruud] van Nistelrooy forced us to accelerate our interest in Huntelaar,” he told Radio Nacional de Espana.
“We wanted to provide our coach [Bernd Schuster] and the players with an extra solution in attack and we decided to sign Huntelaar because he is a great goalscorer.
“We’ve been following him for the last two years and even though we had other options, we concluded that he would be best for us for our long-term project.”