Sergio Aguero scored within a minute of returning from injury as Manchester City thrashed Blackburn to book an FA Cup fourth-round tie against Watford.
The Argentine striker has been out with a calf problem but came off the bench in the second half to turn and fire in.
By that stage, City were already 3-0 up after Alvaro Negredo scored either side of the break and Edin Dzeko squeezed in at the near post.
After Aguero struck, Dzeko converted Jesus Navas’s cross for his second.
It was another demolition by Manuel Pellegrini’s side, who drew 1-1 with Blackburn at Ewood Park in the original tie and have now scored 99 goals in all competitions this season.
The result means they maintain their 100% home game record in domestic completions.