Red Devils No.1 blames bad luck and an organised Manchester City side as prime factors in his team's defeat at Wembley on Saturday but hopes Newcastle visit offers redemption
The Red Devils were eliminated from the FA Cup at the semi-final stage when Yaya Toure seized upon a Michael Carrick error to score the game's only goal.
The 40-year-old Dutchman cited a congested fixture list and bad luck but also admitted his own side were not at the races and crediting Manchester City's organisation for the result at Wembley.
"We started a bit slow but had two chances in quick succession," the Dutchman told MUTV.
"If one of those goes in, maybe it's a different game and they would have to chase us.
"In the second half, when they scored, we went to 10 men, one man down, and it was hard to chase and try to get the equaliser.
"We had some half-chances or possibilities to get the ball into the box but nothing really materialised.
"We were hoping for that famous injury-time goal again but I think our luck ran out a little bit."
United conceded on 52 minutes when Carrick dithered around his own box under little pressure. Van der Sar admitted the goal was a sloppy one to concede.
"You never know, it's always nicer when you score first but that didn't happen and the goal we conceded was a bit scrappy," he admitted.
"It's not the way we normally defend so we have to do something to take the blame - all the players who have been on the pitch. Nobody really performed to their standard, I think."
Van der Sar, in his last season as a professional, conceded that his side were probably tired after so many fixtures thus far this season.
"It's normal, of course City tried to be organised and strong," he said.
"We had a go in the last 20 minutes but just maybe we were a bit tired also in the end.
"We have played quite a big amount of games in the last three or four weeks."
Manchester United have little time to muse upon Saturday's defeat with a Premier League trip to Newcastle awaits on Tuesday.
The United No.1 hopes Liverpool do his side a favour on Sunday, insisting that his club isn't distracted by the allure of a Champions League and Premier League double.
"We have got two days to recover from this game then, on Tuesday, it's an important game," he said.
"First we have to watch our friends from up north [Liverpool] playing against Arsenal [on Sunday] and let's hope they make it a nice game."