Manchester City boss Roberto Mancini fears they've lost their killer instinct, even after victory over Newcastle United.

Goals from Sergio Aguero, Javi Garcia and Yaya Toure sunk the Toon.

But boss Mancini said: "I was anxious. I want my team to become more clinical as that will be better for us.

"I don't understand why we are missing chances.

"When you have six or eight chances you need to score more goals."