BBC News
Jonty Colman
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What are rules on loan players in Champions League?
BBC Sport's Ask Me Anything team explains the Champions League rules on loan players facing their parent clubs
Ethan Nwaneri could play against parent club Arsenal in this season's Champions League for Borussia Dortmund, where he is currently out on loan.
English winger Nwaneri, 19, is currently on a season-… [+2075 chars]
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