Ronaldo always on target against Celta: 12 goals in 6 games
The Portuguese star will be looking to add to his spectacular tally in Balaídos on Sunday.
The first leg will be played on 5 May in Turin and the second leg will take place on 13 of the same month at the Santiago Bernabéu.
Goals from Mayoral and Llorente were not enough to beat the Biscay side at the Di Stéfano stadium.
The teams have met 16 times in the European Cup, with 8 Madrid wins.
The Whites will go top if they beat Dominion Bilbao Basket at the Palacio (12:15pm CEST).