Chelsea boss Mauricio Pochettino admits the pressure will be on summer signing Christopher Nkunku.
The French attacking midfielder, who is a prolific goalscorer, is returning from a knee injury.
Nkunku, who signed in the summer, has not played a competitive game for the club yet.
Asked about his return to fitness, Pochettino stated on Nkunku to reporters: Chelsea, there is always expectation but we need to understand he came from an injury, he needs time, need to be patient with him to start to compete, play.
It's not a competition he is used to playing, coming from the Bundesliga and he needs to recover from his injury, to know the league.
Always is to have time to perform his best."