Speaking to Liverpool's official website, the Portuguese said: "You have a lot of energy when you are young but you still do a lot of mistakes and you always learn with experience. I always look up to [Cristiano] Ronaldo, for example, and I think he scored more goals since he has been over 30 than before he was 30, so that shows as well it’s doable. It also means if you are 26 you can be away from your prime and that’s what I expect – and that’s what I work for as well every day."