Kassai, 35, refereed five Champions League games this season, including the last 16 game between holders Inter and Bayern Munich, as well as the group stage match between Manchester United and Valencia, won 1-0 by the English champions.
He will be assisted by countrymen Gabor Eros and Gyorgy Ring with the fourth official Istvan Vad and the two additional assistant referees Mihaly Fabian and Tamas Bognar.
Reserve assistant referee Robert Kispal completes the all-Hungarian refereeing team for tomorrow’s showdown.