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ARSENAL could be handed a HUGE boost in their quest to overcome Real Madrid in the Champions League quarter-finals.

It comes after Uefa have opened an investigation against Kylian Mbappe and three other Real stars.

Real Madrid players celebrating a goal.Kylian Mbappe is one of four Real Madrid stars under investigation

Antonio Rudiger, Vinicius Junior and former Arsenal loanee Daniel Ceballos are facing disciplinary action for their actions against Atletico Madrid.

A Uefa Ethics and Disciplinary Inspector has been appointed toinvestigate allegations of indecent conduct by all four players.

The incident occurred during Real's second leg last-16 victory against city rivals Atletico on March 12.

Their punishment, if found guilty, is not yet known.

THIS IS A DEVELOPING STORY..