Gary Cahill, sort your feet out.
As Jesus Navas’ right wing cross came into the box, Chelsea’s captain for the day got his feet all wrong. Instead of clearing the ball with his left foot, he took a swipe at a clearance with his right and the ball hooked off his right and into the far corner of his net.
1-0 to Manchester City right on half time.
A nightmare end to a promising first half for Chelsea, and for Cahill...
Click play on the video above to see the horror own goal go in.