The first glimpse of a Man City prodigy was full of promise.

There weren’t a lot of positives for Man City to take from their 1-nil defeat to Crystal Palace in yesterday’s FA Cup final. From a City point of view, the game was filled with what-if moments. What if Dean Henderson saw red? What if Erling Haaland took the first-half penalty instead of Omar Marmoush? Plus the catalogue of saves that Henderson made to preserve Crystal Palace’s…