Ferdinand says Barca's Pedro should be ashamed of himself after seemingly clutching his face after a harmless collision with Real's Alvaro Arbeloa.
The England international also appeared to have sympathy for Real manager Jose Mourinho who reacted bitterly to his side's 2-0 defeat by accusing UEFA of conspiring in favour of the Catalans.
You're off: Jose Mourinho is sent to the stands by the assistant referee during Wednesday night's heated clash
Ferdinand tweeted: 'This diving is a joke/embarrassing. When Pedro watches that do you think he'll think 'What was I doing!?''
Reacting to the comments Mourinho made in his post-match press conference, Ferdinand tweeted on Thursday morning: 'Just woke up,felt a bit tiredwatched the Mourinho press conference from last night and it was like a redbull! He should be pay per view!'
Ferdinand could end up playing against Barca himself in the Champions League final at Wembley on May 28 after United's 2-0 semi-final first leg win over Schalke in Germany.
With United having one foot in the European Cup final and leading the Barclays Premier League, Ferdinand admits he would be 'devastated' if his side did not win either this season.
Embarrassing: Barcelona's Pedro is flat out on the deck as Xabi Alondo of Real Madrid looks on in frustration
At 32, Ferdinand insists he is still hungry to win more trophies, and would have 'nightmares' if he did not add to his trophy haul at Old Trafford.
He said: 'If I finish in two years' time with what I have now, I wouldn't be satisfied. No chance. I would be having nightmares.
'There is so much to be won. If we didn't win the league this year I would be devastated. I want to win the league this year, next year and every year I am playing.
'This is our fourth Champions League semi-final in five years. And we have only won it once. There is a lot of disappointment in those four years.'
Gloves are off: United defender Rio Ferdinand made his comments about the Barcelona-Real match on Twitter
Ferdinand said the neutrals may be getting bored of United winning the the Premier League title so frequently but he cares little for their comments.
He said: 'It was wishful thinking on a lot of people's behalf. People want us to lose because we have won the league three out of the last four years and they probably want to see a little bit of variation.
'But they can have those opinions and keep talking like that. We just try to win games. If we win games and end up winning titles we won't be thinking about what people have said about us.
'What sets us apart from other teams is that the hunger never dies. It stems from the manager and filters down through the squad. We have players in this squad who want to win things.
'There are still players in this squad who have not won the league. There are others who have won it a few times who want more. That is the basis on which we do our work every single day.'
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