UEFA will only allow one of Red Bull Salzburg and RB Leipzig to compete in either the Champions League or the Europa League next season, according to a report from Salzburger Nachrichten.
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Rules state no two clubs controlled by the same sponsor, organisation or person may play simultaneously in European competition.
RB Leipzig's spectacular rise to the Bundesliga has been met with disdain from rival clubs, with many protesting the club's success, having been founded in 2009 as a marketing arm for energy drink giants Red Bull.
Ralph Hasenhüttl's side continue to battle with Bayern to be crowned German champions this season, however, and now look certain to qualify for the Champions League next season.
Red Bull Salzburg will also qualify for the competition should they retain their Austrian Bundesliga crown, though one of the two may be forced to miss out due to UEFA regulations.
Chief of Red Bull Soccer, and in turn responsible for all Red Bull clubs, Oliver Mintzlaff is CEO for RB Leipzig, further suggesting that UEFA will look to avoid competetive distortion.
Mintzlaff is quoted by German publication SID: "We are not nervous at RB Leipzig and also the UEFA signals don't exist. If we qualify there is no reason why we should doubt to play in Europe next season."
A UEFA spokesman said: "“This will be verified by UEFA, once we have received the competition entry forms from the national football associations after the end of the season in the respective leagues.”