“Reiss is a player I have admired since the first day I was here,” said Arteta.
“He has tremendous ability and is such an exciting offensive talent. Reiss knows how important he is to our squad with the quality he has.
“It’s great that Reiss has committed his future to us – he knows this club so well, he grew up here and we look forward to enjoying many more good moments with him.”
While Nelson has extended his stay at the Emirates, Arsenal announced Steve Round has left his position on the backroom staff.
Round was appointed as an assistant to Arteta when the Spaniard first took the reins in December 2019 having previously filled similar roles at Everton and Manchester United.
Technical director Edu informed staff on Thursday, with Round’s exit a mutual agreement with the club.
Arteta and Edu are currently plotting for Arsenal to go one better than last season, where they finished runners-up to champions Manchester City.
Kai Havertz has already joined from Chelsea while a club-record fee has been agreed with West Ham for Declan Rice, who will undergo a medical on Friday.
Ajax full-back Jurrien Timber is the next who could come through the door as Arsenal prepare for a club-record transfer window outlay.
