Premier league side Arsenal face a defensive crisis with German defender Shkodran Mustafi ruled out for four to six weeks, with Laurent Koscielny and Sead Kolasinac doubtful for their clash with Watford this weekend, according to a report on The Independent.

Mustafi injured his thigh on international duty with Germany and it was not clear how long he would be sidelined for until manager Arsene Wenger confirmed today that it was approximately one month.

Wenger admitted that he had “defensive concerns” ahead of their trip to Watford and will be required to shuffle his defensive unit.

Michael Steele/Getty Images Sport

Watford have started the season well and will be hoping to unsettle the Arsenal side early on in their encounter.

“I am thinking about sorting out the [defensive] problem, but overall I will completely decide what I do tomorrow,” Wenger said.

Koscielny will take a late fitness test to decide whether he will be able to play or not as he recovers from a long-term achilles problem.

“He worked quite hard physically, he looks like he is capable of playing if he survives the test. If he has no pain on his Achilles tendon, he can play. I will decide that tomorrow. At the moment, he’s not available,” commented Wenger.

The Gunners could face further disappointment if Kolasinac is deemed unfit to play and the injuries could see young defender Calum Chambers step into the back-three.