Liam Rosenior said his challenge is to take Chelsea to the "next level" as he prepares to take charge of the Blues for the first time in Saturday's FA Cup trip to Charlton.
The 41-year-old has been parachuted into one of the most pressurised jobs in English football after a successful spell at Strasbourg, who are also run by Chelsea's owners BlueCo.
Enzo Maresca became the latest manager to depart Stamford Bridge on January 1 despite winning two trophies – the Club World Cup and Conference League – during his first season in charge.
But Chelsea have won just once in their last nine Premier League games to slip to eighth in the table and the pressure is on Rosenior to secure Champions League qualification next season via a top-four finish.
"The talent levels I have seen over the last few days - the ability levels are world class," Rosenior said at his pre-match press conference on Friday.
"The previous coach Enzo has done a good job tactically and it is my job to take it to the next level and me and my staff are going to work very hard to do that.
"If you are scared or fearful there is no point being a coach. I am going to work 24 hours a day. I am going to push them to try and be successful."