Cole said: "He's a bit of a poker player, isn't he? You don't know whether he's happy. He could score a worldie and he doesn't smile. He keeps his cards close to his chest," said the former Chelsea midfielder.
"The future, the years are passing by for him because he's already a Liverpool great, there's no doubt about that.
"I think the key situation will be does he wants to stay and really take this team? I feel there's years ahead of him, I think he is going to be another five, six or seven years playing because of that professionalism and fitness and he doesn't look like he's letting up. He is still breezing past players."