Need to knowArsenal are set to complete a deal with Borussia Dortmund but could be frustrated by UEFA's rules on Champions League eligibility as they look to get the transfer over the line13:29, 01 Sep 2026Ethan Nwaneri is on the move(Image: David Price/Arsenal FC via Getty Images)Everything you need to know on Ethan Nwaneri's move to Borussia Dortmund from Arsenal...Ethan Nwaneri is finalising a season-long loan move from Arsenal to German club Borussia Dortmund. This transfer is designed to provide the 19-year-old with regular first-team football that he cannot currently get in London.Arsenal were unable to add a clause that would stop Nwaneri from playing against them in the Champions League. This restriction is due to strict UEFA rules that allow loanees to face their parent clubs in European competitions.Arsenal welcome Borussia Dortmund to the Emirates Stadium in November during the Champions League league phase. The German side defeated Arsenal during pre-season, with Nwaneri getting on the scoresheet for the Gunners.This European regulation strongly contrasts with standard Premier League rules that typically bar loan players from facing their permanent employers. A famous historical example of this UEFA allowance is Philippe Coutinho, who scored against his parent club Barcelona to knock them out of the Champions League, while on loan at Bayern Munich.Borussia Dortmund also requested an option to buy Nwaneri permanently at the end of the season. However, Arsenal firmly rejected this request because they still view the young midfielder as a crucial part of their future.The Bundesliga giants accelerated their pursuit of the teenager following a significant injury crisis. Their recent signing Giannis Konstantelias suffered a torn ACL, making Nwaneri an urgent priority for their attacking midfield options.Dortmund will cover the entirety of Nwaneri’s wages during his time at the Westfalenstadion. This financial arrangement benefits Arsenal while allowing the player to develop in a highly competitive environment.This move marks the second consecutive loan spell for the talented English youngster. He spent the latter half of last season at Marseille, where managerial changes unfortunately limited his expected playing time.Arsenal manager Mikel Arteta acknowledged that keeping the player without guaranteeing minutes would be detrimental to his overall growth. By sanctioning this temporary departure, the club hopes Nwaneri will return fully prepared to challenge for a regular starting role.Follow all of the latest transfer news and updates: Transfer deadline day LIVE - Arsenal's last-minute battle, Man Utd priority, mega Chelsea deals