It was yet another defensive horror-show from Arsenal against Atletico Madrid.

While the back-line of Hector Bellerin, Laurent Koscielny, Shkodran Mustafi and Nacho Monreal were rarely tested by the 10-man Spanish side, they failed their one big examination late in the second-half.

Monreal was caught hopelessly out of position by a long ball which fell to Antoine Griezmann, with Mustafi and Koscielny then producing about four errors in a matter of seconds to gift the French striker a precious 82nd-minute equaliser.

It was a complete disaster and the defensive options on the bench highlight how much Arsenal need to reinforce the department in the summer.

Calum Chambers, Rob Holding and Sead Kolasinac all need to seriously improve if they're to have any chance of playing regularly under the new manager.

And it seems the club are already preparing their first major defensive signing of the summer, with Sven Mislintat already working his recruiting magic.

According to trusted German publication Bild, Arsenal are on the verge of signing Borussia Dortmund's Sokratis Papastathopoulos.

The Greek international is widely recognised as one of the division's finest defenders following his move from Werder Bremen in 2013.

He's spent a large part of 2017/18 absent through injury, but the 30-year-old is a real colossus when fully fit.

Sport Witness also point out that this is not simply a rumour, Bild seem incredibly confident that this deal will go through, with Dortmund said to already be searching for his successor.

And what's even better for Arsenal is they will get Sokratis for around €20m due to his contract expiring in June 2019.

The figure is an absolute steal in today's market and it would be a huge coup for the Gunners if they can get the deal done and dusted before the start of the World Cup.