The Spaniard made just eight Premier League appearances last term before a knee injury curtailed his involvement in November.
|8/1||Liverpool are 8/1 with Bet365 to win the Premier League|
"I've been here since last week and I'm really happy," he told the club's official website upon his return to pre-season training.
"I've been waiting for this moment for so long. I'm feeling great.
"I'm really happy to try to be playing games again. I've been working in the summer and I've been here for the last week. I've been working quite a lot in fitness terms.
"You can work on your own but, when you work with other people, it's different.
"They told me little by little, I have to be careful, because I don't want a setback.
"I've been working with the physios; I only stopped for a week but for the rest of the holidays, I have been working because I have to be completely fit for this season."