By Katie Catherall Chelsea boss Mauricio Pochettino has sent a message to fans after crowds at Stamford Bridge aimed boos at Raheem Sterling on Sunday. Chelsea opened the scoreline in the 13th minute, but then a missed penalty from Raheem Sterling just 13 minutes later altered the tone for the remainder of the game. Crowds were quick to show their emotion towards the player, aiming angry boos towards the winger before cheering when he was later substitued. Blues boss Mauricio Pochettino shared his frustrations around the negative reactions, telling fans they need to support players. When asked…