Manchester City midfielder Gareth Barry admits teammate Carlos Tevez is a wind-up merchant.
Reflecting on Tevez's two-goal performance in victory at Chelsea, Barry says the striker was always in the faces of Chelsea's defenders.
He told City's website: "Once they went 2-1 down and down to ten men, they were always going to be chasing the game.
"That's when you can lose your head, so it was important we stayed strong. Then Michael Ballack made a tackle he wouldn't normally make so Carlos has the ability to get under opponents' skin just through his work-rate."