I was surprised when Mikel scored- Mourinho

Jose Mourinho was left to reflect on a job well done after this afternoon's 2-0 victory at Derby in the FA Cup.Like at Southampton on Wednesday, the first half was entertaining and end to end, if shorn of goals, and like at Southampton it needed a second-half header to open the scoring.After Michael Essien was replaced John Mikel Obi took the captain's armband, and, on his 300th appearance in a Chelsea shirt, capped his day with a goal, thumping home Willian's free-kick with a bullet header.Oscar added a second soon after, swerving the ball past Derby's keeper Lee Grant with a fine strike, and the remaining minutes were played out in relative comfort as we eventually eased into the fourth round, where a home tie with Stoke City awaits.