MADRID: UEFA opened an investigation into four Real Madrid stars including Kylian Mbappe and Vinicius Junior on Thursday for alleged “indecent conduct” during their Champions League last 16 win over Atletico Madrid. Madrid’s two superstar forward, as well as defender Antonio Rudiger and midfielder Dani Ceballos, face potential punishment ahead of their quarter-final first leg clash at Arsenal on April 8. “A UEFA Ethics and Disciplinary Inspector has been appointed to investigate allegations of indecent conduct by Real Madrid CF players,” said the European football governing body in a statement.