Reina says he's rediscovered his "hunger" in Italy.
"I am super happy. It was a decision on the rebound but so far at both a sporting and family level everything is going better than expected," he told Mundo Deportivo.
"I know Rafa Benitez perfectly, I know what he can get from me and I see it as a better place to fight for things. It is an interesting sporting project, a major League, there is the Champions League, and this is a young and hungry team.
"Here you have more of a desire to please the fans because they are so demanding. I have that hunger that perhaps I had lost at Liverpool."
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