By Jacob Leeks Former Arsenal and Real Madrid star Mesut Ozil has poked fun at former rivals Atletico Madrid as the introduction of a new blue card is considered. Proposals have been floated over the introduction of the new card as part of sin-bin trials. It would be the first new card colour for 50 years, with the move currently under consideration by the International Football Association Board. The new measures would see players removed from play for 10 minutes if they commit a cynical foul or show dissent towards a match official. They would also be sent off if they receive two blue cards …