The injury to Havertz, 26, leaves the Gunners with just one healthy center forward — new signing Viktor Gyokeres — as Gabriel Jesus has yet to return from last season's ACL injury.

Mikel Arteta will hope to have one of the pair available, otherwise Cristhian Mosquera could be forced to make his Arsenal debut at right-back. Mosquera is a centre-back by trade,

Arsenal had an open training session at the Emirates on Wednesday before their first home fixture of the Premier League season when they host Leeds United on Saturday. Ben White and Kai Havertz were glaring omissions. White came off in the 71st minute in the win at Manchester United on Sunday and Havertz started the game on the bench.

Leeds United started life back in the Premier League with a 1-0 victory over Everton at Elland Road on Monday night, and they take on Arsenal next at Emirates Stadium on Saturday. Leeds will be facing one of their fiercest oppositions this season this weekend given how impressive the Gunners have been in the last three seasons.

Eberechi Eze has been left out of Crystal Palace’s team for its Conference League playoff match on Thursday amid reports the England forward is about to join Arsenal