Cristiano Ronaldo's hat trick for Real Madrid helped knock Bayern Munich out of the Champions League, while Atletico advanced at Leicester's expense.
Clashes happened at half-time of a controversial match that Bayern lost 4-2 in extra time to go out of the Champions League.
Bayern Munich's Arturo Vidal says his side were robbed in their quarterfinal Champions League defeat to Real Madrid.
Bundesliga leaders were angered by several key decision made by Hungarian referee Viktor Kassai.
Once the dust settles and Bayern look at their UCL exit in a colder light, they may admit referee errors were not the only reason why they failed.
Javier Mascherano has shaken off a calf injury to return to the Barcelona squad for their Champions League quarterfinal second leg against Juventus.