Pep's purchase and use of Jack has always been a mystery to me. Before arriving at City he always played as a midfielder and better than that, since he arrived at the club he has NEVER played in his true position.
Jack has never been and never will be a winger, and all he's done since his arrival has been to help out. Don't get me wrong! He's doing very well for a guy whose position it isn't, but at the end of the day: it's not his position.
Gvardiol is another player who is following the same path and who has hardly ever played in his position since his arrival, and he's doing very well too. I know that Pep likes versatile players, but it would be nice from time to time to get them playing in their true positions.