By Felix Keith Chelsea face familiar opposition in the quarter-finals of the FA Cup on Sunday, with a repeat of the 2021 final against Leicester taking place at Stamford Bridge. The Blues’ season is basically on the line, with the FA Cup offering the last vestige of hope for Mauricio Pochettino and his players after they lost the Carabao Cup final. Chelsea are nowhere in the Premier League, but could rescue their campaign by winning a trophy. To do so they will need to better their result from the last time they met the Foxes in the competition. Back then it was Youri Tielemans’ brilliant long…