Manchester City spent much of the summer asking a single question: 'How do you replace Ilkay Gundogan?' It's a simple question to ask, but it's not such an easy thing to answer.
City are no strangers to waving goodbye to legends. Every single summer of Pep Guardiola's reign has seen at least one crucial player or fan favourite depart.
But unlike Joe Hart, Pablo Zabaleta, Yaya Toure, Vincent Kompany, Sergio Aguero, David Silva and Fernandinho, Gundogan was still absolutely crucial to the side.
While the rest had passed their peaks, the German was playing the best football of an already distinguished career. ALSO READ: United vs City as it happened ALSO READ: City player ratings vs United Gundogan was pivotal to the treble triumph, even without his important goals in the Premier League run-in and winning brace in the FA Cup final.