Jose Mourinho's side were held to a 1-1 draw at struggling West Brom in their last top-flight game, and then lost 2-0 in their FA Cup fifth-round tie at Manchester City last Saturday.
|7/1||Chelsea are 7/1 with Paddy Power to beat Everton 2-1|
And Senegalese frontman Ba, who has not featured in Chelsea's last two games, has stressed the importance of responding from their recent setbacks against the Merseysiders.
"We lost the last game in the FA Cup and we don't want to lose two in a row. That would be bad," he told Chelsea's official website.
"We are just going to do everything on Saturday because it's important to get back to winning ways, it's important for the title race and it's important for our confidence."
Chelsea are just one point ahead of London rivals Arsenal in the Premier League, with City a further two points adrift in third spot and Liverpool four behind the leaders.