Manuel Pellegrini's hopes of winning the quadruple remain intact after Sergio Aguero inspired Manchester City to a 3-0 FA Cup third-round victory over fellow Premier League outfit Norwich City on Saturday.
Pellegrini's decision to rest the likes of Yaya Toure, David Silva and Joe Hart was justified as the visitors cruised into round four, Aguero getting more valuable game-time after his recent heel injury.
Slowly Pellegrini's side began to assert themselves with Iheanacho and Aleksandar Kolarov threatening Norwich's goal, the pair both denied by John Ruddy inside the opening 10 minutes.
Having netted his 11th goal in all competitions this season, Aguero turned creator on the half-hour mark as he found strike partner Iheanacho with a low cross, the youngster coolly slotting home Manchester City's second.
Norwich enjoyed a good spell of possession as half-time approached, but Alex Neil's side lacked quality in the final third as the visitors took a two-goal advantage into the break.
Aguero's match-winning display came to an end with 20 minutes to play, the striker withdrawn by Pellegrini to avoid further injury.
They did not have to wait long for the third though, as De Bruyne fired beyond Ruddy with a powerful effort to secure Manchester City's progression.
