Last season's shock 1-0 defeat by League One Wigan is not far from his thoughts and City suffered another scare in the quarter-finals at Championship Swansea in March.
If Mendy is to play a big part, he will need minutes at Wembley this weekend to get up to match sharpness with Guardiola unconvinced by right-back Danilo's ability to switch sides as he did for the final hour against Cardiff. We will try to win them with all we have. We are Chelsea, and it is a big derby.
Sergio Aguero will travel south with his teammates on Friday but Guardiola is unsure whether he will be fit to face Brighton.
"We are not shying away from the fact we are facing a tough task".
I've seen a focus in my players' eyes all week.
Stand-in left back Oleksandr Zinchenko has a hamstring injury and Guardiola is ready to draft Benjamin Mendy, who has been recovering from a knee injury, into the side for the first time January 23 as a result. Now it's the business end I just need to do what I can do to help the team win games.
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Asked if he could return to his best before the end of the campaign, De Bruyne added: "No, probably not - not compared with a year ago".
Stephens was asked about if him and his teammates are prepared not to see much of the ball against City: "Perhaps I think that probably the way many teams have set up against a team that is so possession based like they are and they do it so well".
"People are not talking about Chelsea for the top four and I like that", said the Belgium forward.
The Seagulls have endured a tough season, now sitting 15th in the league despite continued glimpses of success under Chris Houghton since their promotion - but their FA Cup run promises to form an enduring memory for the seaside club. 'You know I told him if he stays humble, for me it is the best thing, to stay humble.
We've scored 19 goals in four games, which is very good, and played open, attacking football throughout. He said: 'Of course when we are playing we want young players and also English players because we are in England, but we also have Willian, Pedro, me - we have not only two wingers, we have four - but his time is coming.