The official Chelsea app has now given a hint as to one player who may make a rare appearance in the matchday squad tonight to take on Leeds United. According to their team news story this morning, manager Mauricio Pochettino could look to his youngsters as he battles with the injury problems in his squad. The Blues injury list is back up to an unusual high off the back of the recent EFL Cup final defeat against Liverpool. Christopher Nkunku, who was still being eased back into the side by the time the final came around, is now back on the treatment table for up to another month. He has joined…