That lead was cancelled out by Swansea 's Fernando Llorente .
Aguero later added a second from the penalty spot , while Raheem Sterling made sure of the win with a third in the final 15 minutes .
That lead was cancelled out by Swansea 's Fernando Llorente , but Aguero later added a second from the penalty spot , while Raheem Sterling made sure of the win with a third in the final 15 minutes .