LONDON, ENGLAND – AUGUST 14: Theo Walcott of Arsenal tripped by Liverpool defender Alberto Moreno during the Premier League match between Arsenal and Liverpool at Emirates Stadium on August 14, 2016 in London, England. (Photo by Stuart MacFarlane/Arsenal FC via Getty Images) *** Local Caption *** Theo Walcott;Alberto Moreno

LONDON, ENGLAND – AUGUST 14: Calum Chambers scores Arsenal’3rd goal during the Premier League match between Arsenal and Liverpool at Emirates Stadium on August 14, 2016 in London, England. (Photo by David Price/Arsenal FC via Getty Images) *** Local Caption *** Calum Chambers

LONDON, ENGLAND – AUGUST 14: Alex Iwobi of Arsenal breaks past Sadio Mane of Liverpool during the Premier League match between Arsenal and Liverpool at Emirates Stadium on August 14, 2016 in London, England. (Photo by Stuart MacFarlane/Arsenal FC via Getty Images) *** Local Caption *** Alex Iwobi;Sadio Mane

during the Emirates Cup match between Arsenal and VfL Wolfsburg at the Emirates Stadium on July 26, 2015 in London, England.

LENS, FRANCE – JULY 22: Alex Oxlade-Chamberlain chips the ball over Lens goalkeeper Douchez Nicolas to score the Arsenal goal during a pre season friendly between RC Lens and Arsenal at Stade Bollaert-Delelis on July 22, 2016 in Lens. (Photo by Stuart MacFarlane/Arsenal FC via Getty Images) *** Local Caption *** Alex Oxlade-Chamberlain;Douchez Nicolas

LENS, FRANCE – JULY 22: The Arsenal team line up before a pre season friendly between RC Lens and Arsenal at Stade Bollaert-Delelis on July 22, 2016 in Lens. (Photo by Stuart MacFarlane/Arsenal FC via Getty Images) *** Local Caption *** Arseal team

LENS, FRANCE – JULY 22: Serge Gnabry takes on Bellegarde Jenarichner of Lens during a pre season friendly between RC Lens and Arsenal at Stade Bollaert-Delelis on July 22, 2016 in Lens. (Photo by Stuart MacFarlane/Arsenal FC via Getty Images) *** Local Caption *** Alex Iwobi;Bellegarde Jenarichner

LENS, FRANCE – JULY 22: (L-R) Chris Willock and Joel Campbell of Arsenal before a pre season friendly between RC Lens and Arsenal at Stade Bollaert-Delelis on July 22, 2016 in Lens. (Photo by Stuart MacFarlane/Arsenal FC via Getty Images) *** Local Caption *** Chris Willock;Joel Campbell

GOTHENBURG, SWEDEN – AUGUST 07: Granit Xhaka of Arsenal challenges Fernandinho of Man City during the match between Arsenal and Manchester City at Ullevi on August 7, 2016 in Gothenburg, Sweden. (Photo by David Price/Arsenal FC via Getty Images) *** Local Caption *** Granit Xhaka; Fernandinho

GOTHENBURG, SWEDEN – AUGUST 07: Theo Walcott of Arsenal takes on Aleksander Kolarov of Manchester City during the match between Arsenal and Manchester City at Ullevi on August 7, 2016 in Gothenburg, Sweden. (Photo by David Price/Arsenal FC via Getty Images) *** Local Caption *** Theo Walcott; Aleksander Kolarov