Real Madrid star Vinicius Junior has called on UEFA to issue sanctions over racist chants about him by Atletico Madrid fans.
Robert Lewandowski's late goal saw Barcelona through to the Champions League quarter-finals with a 3-1 win over Napoli.
David Raya saved two penalties as Arsenal beat Porto 4-2 in a shoot-out to reach their first Champions League quarter-final in 14 years.
Barcelona manager Xavi Hernandez found himself in the limelight as he discussed the team's recent 1-1 draw against Napoli in the UEFA Champions League.
Barcelona faced a golden opportunity in their Champions League round of 16 first-leg clash against Napoli, but squandered it on Wednesday.
Mikel Arteta bemoaned a lack of aggression from his Arsenal side in the Champions League defeat at Porto.