On 12 May 2017, Brych was chosen by UEFA as the referee for the 2017 UEFA Champions League Final, played in Cardiff on 3 June 2017 between Juventus and Real Madrid. He was joined by assistants Mark Borsch and Stefan Lupp, and the fourth official was Serbian Milorad Mažić. Bastian Dankert and Marco Fritz served as the additional assistant referees, with Rafael Foltyn appointed as the reserve assistant referee.