Manchester City scraped past West Ham United on Wednesday night after Sergio Aguero converted a debatable second-half penalty.
The hosts dominated possession and territory at the Etihad Stadium, yet failed to carve out many clear sights of goal as Manuel Pellegrini's men defended resolutely. However, fortune favoured the champions as referee Stuart Attwell awarded them a spot-kick following Felipe Anderson's collision with Bernardo Silva.
The visitors were left aggrieved by the decision as the contact on Silva appeared to be minimal. The Portuguese's introduction ultimately decided the game, with his incisive passing and clever runs finally giving the opposition genuine cause for concern.