*Raheem Sterling has big penalty shout for Man City turned down *Lionel Messi slots home the opener after a blistering counter-attack *Ilkay Gundogan scores after capitalising on Sergi Roberto mistake *Fantastic Kevin De Bruyne free-kick puts Manchester City ahead *Ilkay Gundogan scores to make it 3-1 in mesmorising performance *Man City starting XI: Caballero, Zabaleta, Stones, Otamendi, Kolarov, Fernandinho, Gundogan, Silva, Sterling, De Bruyne, Aguero *Subs: Gunn, Nolito, Navas, Clichy, Kompany, Iheanacho, Fernando *Barcelona starting XI: Ter Stegen, Sergi Roberto, Mascherano, Umtiti, Digne, Rakitic, Busquets, Andre Gomes, Messi, Luis Suarez, Neymar *Subs: Cillessen, Denis Suarez, Turan, Rafinha, Alcacer, Nili, Marlon