Chelsea boss Guus Hiddink has been explaining why he substituted Baba Rahman at half-time at Southampton after the left back made an error.

"He was sitting in the dressing room and before I announced it he was down, so that's why we made a change," said the Dutchman.

"He has to recover but you cannot always wait. We need everyone. He did some decent play in the recent games but we like to be critical."