Shearer told Betfair: "I don't know what's going on with Jadon Sancho in terms of his training or his life, but he's got an opportunity at Villa now, and if it doesn't work out here, people will look back and say, 'Hang on, you've been given so many opportunities.' You can only have so many.
"I guess it is humiliating when you're put on as a sub and then taken off again. It hasn't worked out yet for him, but there's only one way around it and that is hard work. Get your head down, get your attitude right, and if you do that, things will turn around."