By Felix Keith Mauricio Pochettino has urged his players to speak carefully to avoid further upsetting Chelsea fans after Noni Madueke criticised them. Chelsea return to action in the Premier League against Burnley on Saturday following the international break in a strange place with their own supporters. Their last match at Stamford Bridge saw Pochettino bombarded with chants of “you don’t know what you’re doing” for his substitutions and Raheem Sterling jeered for taking a dreadful free-kick. The Blues beat Leicester 4-2 in that match to book a place in the FA Cup semi-finals, but the game e…