Graham Potter
The London club are 10th in the league standings with 38 points, but 11th-placed Villa are level on points and will overhaul them if they win at Stamford Bridge on Saturday.
Chelsea signed Ukrainian winger Mykhailo Mudryk on an eight-and-a-half-year contract while defender Benoit Badiashile and winger Noni Madueke have agreed seven-and-a-half-year deals during a busy transfer window for the Premier League side.
A 2-1 defeat at Fulham on Thursday dealt another blow to their chances of qualifying for the Champions League, leaving them 10th in the Premier League standings and 10 points adrift of fourth-placed Manchester United, who have a game in hand.
Felix, whose loan signing cost Chelsea a reported nine million pounds, is now set to miss the next three league matches against Crystal Palace, Liverpool and Fulham.
Chelsea have dropped to 10th in the Premier League after winning only one of their last eight games, and have also been knocked out of both the FA Cup and League Cup, with last year's expensive transfer intake largely struggling to make an impact.
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