Andre Villas-Boas maintains he will not make the same mistake as Manchester City counterpart Roberto Mancini and underestimate Everton.
Mancini blamed himself for his side's 1-0 defeat at Goodison Park on January 31, claiming: "I didn't prepare well for this game. I thought it was maybe easier."
Despite winning a Carling Cup tie in extra-time there earlier this season, Chelsea do not have the best record at Everton, not winning in the league since 2008.
Villas-Boas insists he will ensure his side are fully prepared as Chelsea look to keep the distance between themselves and the chasing pack.
"We never underestimate Everton because our record at Goodison Park is not impressive," Villas-Boas said.
""It is a difficult place to go and a team that has made a great transfer market without a lot of noise but with the right buys.
"It is fantastic to see Darron Gibson playing more often because he is a player of immense talent and Landon Donovan coming back to a place he knows well.
"The additions they made were fantastic, improving them a level and making them even more difficult to play against."