Chelsea may now have to give serious consideration to replacing Mauricio Pochettino, if they were not already. Mauricio Pochettino has just overseen a huge defeat, with Chelsea losing 5-0 to Arsenal last night. It comes after elimination from the FA Cup last weekend, which ensured that the Blues will finish this season trophyless. They remain three points behind sixth-placed Newcastle United following their hammering at the Emirates yesterday, and the Magpies have the chance to increase that gap tonight when they take on Crystal Palace. Things are not looking good for Pochettino, who could be …