Adam Johnson, Carlos Tevez, David Silva, Patrick Vieira and Yaya Toure were all on target as City moved into third place in the Premier League table, a point ahead of Chelsea and six points clear of fifth-placed Tottenham Hotspur.
“It was important for us to win this game because we had the chance to go into third position,” Mancini said.
“Before the game I thought it would be difficult because it is not easy to beat Sunderland.
“They are a strong team who work very well and their manager knows everything. But we started the game brightly and that was important.
“I am surprised but I am happy. It is important that we scored five goals.
“It is possible that it will give us confidence for our remaining games, but it is important now that we continue and go to Liverpool looking to win next Monday.” 

See the article here:
Roberto Mancini ‘Surprised’ By Sunderland Demolition
