Ethan Nwaneri could face parent club Arsenal for Borussia Dortmund in the Champions League on Tuesday, 24 November. The 19-year-old English winger is on a season-long loan with Dortmund. Unlike English football rules, Uefa allows loan players to compete against their parent clubs in European competitions.
Nwaneri is one of 12 loan players in this season's tournament. Of those 12, only three are initially eligible to play against their parent club, and Nwaneri is the only one with a match yet to take place. Dutch defender Lutsharel Geertruida featured for PSV Eindhoven against RB Leipzig earlier this month.
Lask's Robert Ljubicic played against AEK Athens in the opening round. Liverpool defender Ronald Araujo is also on loan. Should Liverpool and Barcelona meet later, Araujo's employers would clash.
Uefa's long-standing rule permits these reunions. In 2004, Fernando Morientes scored in both legs for Monaco against Real Madrid. In 2014, Thibaut Courtois helped Atletico Madrid beat Chelsea in the semi-finals, despite Chelsea's claim for €3m compensation, which Uefa rejected.
Source: BBC Sport Football · Summarized by HeadlinesBriefing