The Argentine was speaking in an interview with Big Time when he was asked about when he will retire from football. According to him, when he sees that he is no longer valuable to his team again then that is the time to leave.
He said,
I know that the moment I feel that I am no longer able to perform, that I no longer enjoy [playing] or [can] help my teammates, I will quit. I am very self-critical of myself, I know when I’m good, when I’m bad, when I’m playing well and when I’m playing badly. When I feel it’s time to take that step, I’ll take it without thinking about age. If I feel good, I’ll always try to keep competing because it’s what I like and I know how to do.”
However, he said that retirement is not yet on his mind because he is trying to enjoy each day as it comes his way
