The second yellow was quite reckless as the Leicester player was still in his own half and still had a lot to do.
The Chelsea youngster hung his head as he walked off the pitch with none of his teammates coming to his rescue.
Kepa Arrizabalaga sat on the bench, noticed it had been a long walk, jumped to the youngster and had a word of encouragement before allowing him to go and have an early bath.
Chelsea thought they had taken the lead though with 10 men after the irrepressible Reece James smashed his shot off the post.
Leicester then also had their chance with Jamie Vardy presented with a perfect opportunity but the English missed the golden chance after shoting wide.
Leicester thought they had taken the lead when Daniel Amartey pounced on a loose ball to finish but the referee had noticed a foul on goalkeeper Edouard Mendy.
The Chelsea goalkeeper was again called on to make a agreat save with the last kick of the first half, as he made himself big to stop a Timothy Castagne effort. The Leicester man needing lengthy treatment after his shot.
Chelsea still have a lot to do with 10 men and needing a fiersty response in the second half.