Jose Mourinho believes Manchester United was better than his team during Real Madrid's 2-1 victory at Old Trafford.
United attacker Nani was sent off in the second half for a high challenge on Alvaro Arbeloa, with Madrid going on to score twice after that decision to walk away with a 3-2 win on aggregate.
"Independent of the decision, the best team lost,"Mourinho told Sky Sports after the game.
The Red Devils had taken the lead shortly after halftime when Sergio Ramos deflected Nani's cross past his own goalkeeper, before the same United player was shown a straight red card by the referee Cuneyt Cakir.
Los Blancos overturned United's lead following Nani's dismissal as Luka Modric and Cristiano Ronaldo scored in quick succession, but their coach said after the game that the Spaanish club was fortunate to triumph.
"We didn’t play well, we didn’t deserve to win, but football is like this," Mourinho told the TV station. "I’m not speaking about the decision [Nani red card] because I am not sure about it. Independent of that, the best team lost."
The draw for the quarterfinals will take place in Nyom on March 15.