Real Madrid manager Carlo Ancelotti, as expected, names Jude Bellingham in his starting line-up.
The Italian makes four changes to the side that beat Real Sociedad 2-1 on Sunday. Lucas Vazquez, Nacho Fernandez, Luka Modric and Eduardo Camavinga come into the side.
Toni Kroos, Fran Garcia and Federico Valverde drop to the bench, while Dani Carvajal isn’t in the squad.
Real Madrid XI: Kepa, Lucas Vazquez, Rudiger, Nacho, Alaba; Modric, Tchouameni, Camavinga; Rodrygo, Bellingham, Joselu.
Subs: Lunin, Cañizares, Kroos, Valverde, Ceballos, Fran García, Brahim Diaz, Mendy, Gonzalo, Tobias.
Juventus legend Leonardo Bonucci makes his Union Berlin debut having joined the German side at the start of September. He’s one of four changes as Lucas Tousart, Josip Juranovic and Sheraldo Becker also come into the side that lost to Wolfsburg in the Bundesliga on Saturday.
Robin Knoche, Janik Haberer, Christopher Trimmel and Chelsea loanee David Datro Fofana miss out.
Union Berlin XI: Ronnow, Bonucci, Doekhi, Diogo Leite; Juranovic, Tousart, Kral, Laidouni, Gosens; Becker, Behrens.
Subs: Schwolow, Stein, Jaeckel, Aaronson, Volland, Fofana, Roussillon, Trimmel, Kemlein.