Kylian Mbappe has just given Mikel Arteta and Arsenal new Real Madrid tactical blueprint

Tactical use of bad behaviours and otherwise frowned-upon techniques in order to gain an unfair advantage or disrupt the opposition, otherwise known as football's 'dark arts'. is living proof that such a method is how 's advance to the semi-finals at 's expense.

After all, the hard work is already done. They hold a three-goal advantage from last Tuesday's phenomenal first-leg meeting at the Emirates Stadium. It is an occasion that will be recorded vividly in European football history books.

But ultimately, it is up to the Gunners if this is to be remembered as part of their finest-ever achievements on the continent - eliminating the 15-time, reigning champions - or their greatest failure in which they would join AC Milan, Paris Saint-Germain and Barcelona as the only clubs to ever fumble such a strong aggregate lead.

Because of the first-leg scoreline, Arsenal would be naive not to expect a hostile greeting from the moment they arrive in Spain right through to when Wednesday night's match finishes. Arteta can combat this by instructing his squad, from the moment they get out onto the Santiago Bernabeu's turf, to become the most difficult team to play against. Defensive rigidity, unclouded focus and togetherness are the orders of the day alongside a healthy dose of wind-up merchants.

Of course, they would tread a fine line playing in this deliberate way - but not if they are successful in making their opponent fold first. To that end, .

Star striker Mbappe - one of those they will be reliant upon for goals against Arsenal - caved to frustration and got himself sent off. "I haven’t spoken to him. First of all, we have to say that Mbappe is not violent, he has asked for forgiveness, he is aware of what he has done," said Davide Ancelotti, son of manager Carlo, who was serving a touchline ban in Vitoria-Gastiez.

"It’s a red card and he paid for it. Surely the many small fouls made him react like that. It’s not the way to react but surely that's what happened."

The Frenchman will be subject to a domestic two-game suspension at least, .

So by straight admission, there is one glaring Real weak point the Gunners defence can hone in on as they strive to maintain their strong foundation. Vinicius Junior is another with a proven short temper having been given his marching orders for striking Valencia goalkeeper Stole Dimitrievski in a Spanish league match in January - his third career sending-off.

And , completing a trio of threats to Arsenal's peace, is another who has been on the wrong side of the law this season. For dissent, the Englishman was red carded against Osasuna two months ago.

The longer the Gunners can hold out, the higher Real's exasperation will grow. This will be the base on which they build their second-leg success.