Arsenal defender Skhodran Mustafi ruled out for at least a month

Arsenal defender Skhodran Mustafi ruled out for at least a month

And he is having to give Laurent Koscielny as long as possible to prove his fitness for Saturday's Premier League clash with Watford because he is so short of defenders.

Hal Robson-Kanu of West Bromwich Albion and Shkodran Mustafi of Arsenal battle for the ball during the Premier League match between Arsenal and West Bromwich Albion at Emirates Stadium on September 25, 2017 in London, England.

Low's men put on a show, storming to a 5-1 victory, but Arsenal defender Mustafi was forced off in the 36th minute with a thigh injury.

The Cottagers, who are 10/11 (1.91) favourites to beat the Lilywhites, are unbeaten in five meetings with Preston and won back-to-back matches before the worldwide break, so they go into the game in strong form and have a great chance of doing their bit for the treble.

Meanwhile, Laurent Koscielny and Danny Welbeck are also at risk of missing the game due to injuries.

'Koscielny has a definite final test tomorrow but at the moment he is not available. "But he trained on his own and the first signs are positive so we chose to give him a test tomorrow". For Arsenal, they face a tricky trip to Watford to face a deceptively risky side who are well-drilled, industrious, and fit under the tutelage of Marco Silva. We will check him today.

We lost Mustafi for four to six weeks, I don't think he will be available before the next worldwide break.

"I will decide what I have to do when Koscielny has his test tomorrow".

He missed Arsenal's game against Brighton, and according to The Telegraph, he is yet to return to full training and could miss the trip to Vicarage Road as well.

"The minor problem we have with Sead Kolasnic, we'll check him today, it's a hip problem", the Frenchman said on Thursday.

Alexis Sanchez will not report back from global duty with Chile until Friday, but Wenger has no concerns over the forward or Aaron Ramsey's mental state after their World Cup exits.