With Alex Ferguson's team visiting Anfield at the weekend it will be a big debut for the Spaniard but it is one he is eagerly awaiting.
He said: "I am going to Liverpool and it was not a decision that I took in a second. My family and I thought about it a lot.
"I told the club that I wanted to play, I had various offers but I thought the most interesting one was Liverpool.
"Now all I can do is hope that the medical goes well and I am registered in time to play on Saturday.
"You can't ask for more than a debut against Manchester United. It would be a great debut for me and even better if the team wins.
"I am grateful the club have accepted my wishes to go to Liverpool rather than other better offers they could have had.
"All I can say is thanks to all the clubs who were interested. One of them was Lyon, but when their offer came in I had given my word to Liverpool.
"The Lyon offer came later and I had made my decision. I wanted to go to England."