Theo Walcott says one Manchester City star plays as if he’s much older than he is. The Blues recently beat Champions League-chasing Aston Villa 4-1 on Wednesday night at the Etihad Stadium. After this game, one figure in Pep Guardiola’s squad, who had a big impact in the win against Villa, found himself on the end of some significant praise from one former top-flight star. Walcott hails ‘extraordinary’ City star Speaking in BBC 5 Live Sport, Walcott had this to say about Phil Foden after his performance against Villa in midweek. He said: “Phil Foden has learnt from Bernardo [Silva], David Silv…