And this is an important issue because just under half of all Arsenal’s yellow cards are for these mysterious “other” reasons. Whereas only 19% of Liverpool’s cards are for this secretive “other” ...

Worryingly, the Dutch international has received more yellow cards this season than any other Arsenal player, with nine in 44 appearances. Gabriel Martinelli is the third Gunner on a tightrope.

The Arsenal trio were all on two yellow cards going into the first leg of their quarter-final tie, meaning a caution in Tuesday's match would see them obtain a one-match suspension for three ...