Mikel Obi celebrating his goal with his Captain Armband after putting Chelsea 1-0 up against Derby

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Chelsea continued on in the FA Cup, defeating Derby County 2-0 at Pride Park
Mikel heads the ball into the net to break the deadlock for Chelsea in the 66th minute.

Mikel heads the ball into the net

Oscar (right) is congratulated by Willian after doubling Chelsea's lead

John Obi Mikel the goalscorer set Chelsea on their way to a 2-0 FA Cup third-round win at Derby which featured another diving incident.
But Mikel headed in his fourth Chelsea goal on his 300th appearance after 66 minutes and Oscar added a second soon afterwards.