By Jacob Leeks Mauricio Pochettino has issued a worrying update about the injuries to Robert Sanchez and Marc Cucurrella, with the Chelsea boss admitting he is praying they are not serious. Both players had to be brought off six minutes from time during the Blues’ defeat to Everton on Saturday. Sanchez has become Pochettino’s number one keeper this season after arriving from Brighton, while Cucurrella started at left-back for the visitors. They were replaced late on by Djordje Petrovic and Ian Maatsen respectively though as Pochettino’s side suffered a dismal defeat. And the Blues boss admitte…