David De Gea accepts defeat, Manchester United knocked out of Champions League by Atletico Madrid

"I don't want to talk about the referee. Everyone watching can see and we can't change it. It's not enough," said Gea.

Not a few Manchester United fans have criticized referee Slavko Vinci while he was in charge of the match.

Manchester United has been in the shadow of its fans, due to the defeat suffered in the elite competition since the departure of Sir Alex Ferguson, in 2013.

It is clear that frustration is also looming over the players, especially the Manchester United star Cristiano Ronaldo.

What's next for Manchester United? Considering they have to go through another trophyless season. Having been knocked out of the FA Cup by Middlesbrough, knocked out of the Carabao Cup by West Ham, knocked out of the Champions League by Atletico Madrid and uncertain for a top four finish in the Premier League.