Tbh, probably not Mourinho’s ‘system’, but more we’ve got a combative Dele back who’s covering loads of space and the ball is being moved more quickly from MF, meaning it comes on the forwards quicker. In short, Sonny’s just adjusting to it. It’s easy for Harry as he doesn’t have to run as much, and Lucas was always the sub and is allergic to passing so the changes don’t affect him as obviously.