Chelsea defender David Luiz admits there's some regret they didn't finish off Manchester United in their FA Cup tie earlier this month.

At one stage, it looked as if Chelsea would be out of the FA Cup having trailed 2-0 at Old Trafford before mounting a stirring comeback which on another day could have seen them go on to win the tie.

Luiz accepts it was perhaps a missed opportunity.

He said: "People saw the match and in the second half Chelsea controlled all the game and we had the opportunities to win. I felt a little bit sad, but now we have another game to win.

"We have an opportunity on Monday. When you do well on the pitch (against them) this gives you a lot of confidence."