Mustafi suffered the muscle problem while on global duty with Germany against Azerbaijan as the holders secured their place at the 2018 World Cup on the back of 10 straight qualifying wins in Group C. He produced a display that Wenger described as "outstanding" in a 4-2 win, which has sparked speculation over whether he will be awarded a new contract.
"I haven't seen everybody because some players are coming back today, some even tomorrow like Alexis Sanchez", Wenger said on Thursday, when questioned about injuries picked up during the worldwide break. We will check him today.
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 global break, so they go into the game in strong form and have a great chance of doing their bit for the treble.
LONDON, ENGLAND - MAY 27: Per Mertesacker of Arsenal and Arsene Wenger, Manager of Arsenal speak prior to The Emirates FA Cup Final between Arsenal and Chelsea at Wembley Stadium on May 27, 2017 in London, England.
Stolen truck explodes in fireball after crashing into four cars in Australia
The semi-trailer burst into flames after ploughing through other vehicles and part of a building, injuring eight people in total. Police said the truck was sighted driving erratically south along the highway, through Muswellbrook and towards Singleton.
"Ozil and Welbeck are back training with the group and will be part of the group for this weekend".
The central defender missed France's recent internationals and has not played since the victory against West Bromwich on September 25 due to an ongoing Achilles problem. At the moment, he's not available. Sanchez won't be back with us until tomorrow.