"I am really pleased to have signed Fernando. We know we are bringing a really good young player to Liverpool with a great future ahead of him," said the Reds boss.
"We know he is an expensive signing but it's not as much as people have said, and this is a very good investment for us. He is the player we wanted and the kind of player we need because he plays with passion.
"He has power and pace. He is good in the air and he can score goals. He is a different type of striker to the ones we already have and he can give us a lot of things.
"He is a very good player who can score a lot of goals for us. I am not going to put pressure on him and say Fernando is going to score over 20 goals in a season for us, because I prefer to have four strikers with 15 goals each.
"Even though he is a young player he has experience because he was playing in the Spanish First Division when he was just 17.
"He is desperate to win trophies with us and he wants to win everything that is possible."