xG is far from perfect, and I share the feeling that Foden did well to keep the ball under pressure before passing to Aguero. However, I've always thought that assists is an extremely approximate measure of chances created, since a sideways pass at the top of the box followed by a worldy finish gets as much credit as beating three players in the box and then passing sideways for an open goal tap in. xA (expected assists) does a much better job of measuring the quality of the chance you've created for another player, irrespective of their finishing. So I think Foden did well, but turning that into a goal was almost all down to Aguero.