Former Arsenal defender Martin Keown says Chelsea manager Graham Potter was "too clever" with his tactics for defeat at Brighton.
Potter played Christian Pulisic and Raheem Sterling as wing-backs in the 4-1 defeat.
Keown said: "Chelsea looked unrecognisable at the back.
"I think there were too many changes. It counts against you in this situation because you are trying to formulate partnership and it's always changing at the back. It was a different back three today.
"They are wing-backs that aren't wing-backs. They played Raheem Sterling in a wing-back position today and I don't think it suited in the way they played. Maybe Graham Potter was trying to be too clever. Keep it the same and football is a simple game."
