Ederson produced two howlers as Manchester United beat Manchester City 2-0 at Old Trafford.
The Brazilian goalkeeper let Anthony Martial's shot slip through his grasp in the first half and then allowed Scott McTominay to make it 2-0 with the last kick of the match.
It was a disappointing afternoon for Pep Guardiola and his side as they further let slip of their Premier League trophy.
Liverpool's lead at the top is 25 points and only a miracle will stop them winning the title now.
Guardiola insisted that Ederson will come back stronger after his dismal performance in the derby but it was a display he may take some days to recover from.
His first clanger enabled Martial to give the Red Devils the lead in the first half.
And with seconds remaining, he gifted United a second goal when his throw found McTominay instead of a teammate.
The Scotland international fired the ball in from 40 yards out to cap a day to forget for Ederson.
Ole Gunnar Solskjaer’s side should have been given the chance to double their lead from the penalty spot minutes before half-time when Nicolas Otamendi made contact with Fred inside the area.
Fred was shown a yellow card and even more inexplicable was the failure of VAR to intervene.
There was more VAR controversy after the restart after Sergio Aguero’s equaliser was ruled out for offside.
The Argentinian fired the ball beyond David De Gea but the assistant referee raised his flag, despite the call being incredibly close.
It was reviewed by VAR but rather strangely, the check didn’t last long at all.
But Guardiola can't have any complains after watching his team produce a subpar display at Old Trafford.
United did the double over City in the Premier League this season and it's only a matter of time now before Liverpool hoist the trophy.News Now - Sport News