Most people inside The Emirates were unhappy Arsenal fans today but there was one man, Emiliano Martinez, who was delighted with the result. Aston Villa strode into north London with a solid game-plan and it worked to perfection, as Unai Emery got one over on his former team. Goals from Leon Bailey and then Ollie Watkins ensured Villa put a massive dent in Arsenal’s title bid on the same day that Liverpool threw it away against Crystal Palace. READ MORE: Michael Owen praises one Arsenal player in defeat to Aston Villa For Arsenal, it was a dismal day at the office and one they’ll want to quick…