Arsenal defeated Chelsea, but Rosenior - finally! - broke their set-piece cheat code

So much has been said about Arsenal boss Mikel Arteta, his assistant Nicolas Jover, and their notorious set-piece routines that have made a complete mess over the last season or two.

The Gunners were ruthless in both the Premier League and the Champions League, outsmarting their rivals and forcing them to concede many goals from free kicks and corners.

The setup is actually quite simple, despite countless variations on the pitch - they overcrowd their rivals’ boxes, especially the six-yard box and around - precisely - the opponents' keepers. Also, very good crosses are essential for this little trick, as Declan Rice and other Gunners are immaculate when it comes to delivery.

Moreover, their tall defensive towers, such as Saliba or Gabriel, are exceptional at headers and disrupting goalkeepers' movements. But could Jover's tricks work permanently? Probably not.

Especially after Tuesday night, when Chelsea boss Liam Rosenior made a brave and somewhat witty attempt to break that cheat code. Despite the Blues' loss, maybe for the first time this season across all competitions, we actually saw someone trying to respond to Arsenal's set-pieces and not make themselves bystanders, as all the others had previously done.

Arsenal are seven points clear, as Jover's lethal weapon keeps bulldozing Premier League

What was the solution? Rosenior decided to fight back wisely - three Chelsea players left their own box seconds before Declan Rice's corner kick, rushing to the opposite end of the pitch, thus forcing as many Arsenal players to give up on their already planned attacking routine and to get back to their half, instead.

Sure, no one says that it's impossible to score without those three players inside the box - all you need is still an excellent cross and a fine header - but this Rosenior's execution will definitely be a food for thought for other EPL and UCL managers.

These little tactical moves, at least, will force Arsenal to alter their current highly successful approach a bit. And the numbers will show if they'll be able to accommodate, or Jover's magic won't be as lethal as it was until a few days ago.