He said: “I would have trouble explaining how we lost that in Spanish; in English I find it almost impossible.
“We dominated the game, were in control and had plenty of attacks. Sometimes football is all about luck. You must be careful against a team as good as United.”
He added on United’s title chances: “United are really close to the title now. Chelsea are a good team, but they cannot make mistakes now because United will continue to win.
“As for us, we are down now, but we will train hard and be ready for our Champions League tie against Barcelona on Tuesday.”
