Real Madrid beat Atletico Madrid on penalties (2-2 on aggregate, 4-2 on penalties) in the UEFA Champions League Round of 16. Next up for Los Blancos is a clash against Premier League giants Arsenal. It's a mouth-watering showdown between two top European sides.

Real Madrid beat Atletico Madrid in a Champions League penalty shootout — again — to keep its title defense alive Wednesday and advance to the quarterfinals.

When is it? How can you watch it? What are the possible line-ups? All you need to know about the UEFA Women's Champions League quarter-final first leg between Real Madrid and Arsenal.