Today's front-page headlines from Marca, AS and Mundo Deportivo.
The great challenge
Florentino challenges the Real Madrid team to do what no one has - retain the Champions League
The champions begin their title defence
Saul lays down the law of Atletico
Celtic pay for the Alaves win
Champions begin title defence
Bale/Benzema/Ronaldo to start for Real Madrid
Asensio and Isco fall from the list
Jorge Jesus: 'Madrid are the best team since Zinedine Zidane arrived'
Saul secures three golden points - Griezmann and Filipe Luis excellent, Oblak saves penalty
A Barca exhibition against Celtic
Sampaoli: 'Luckily football is a collective sport, if it were individual we'd have a problem'
Golden blondes
Messi gets a hat-trick and Neymar grabs four assists
A Suarez double, an Iniesta goal and Ter Stegen penalty save complete a 'perfect' performance
Ceferin to be elected as new UEFA president
Saul's goal put's Atletico into the ascendancy
