Watch this video. Around 55 seconds in. They were tanged up to begin with since Ramirez had his leg up and Vertonghen was trying to get by. There was no knee in the ass as Vertonghen was already slightly in front of him at the there was a hitch there before Ramirez bought him down, even though they were already tangled. Unless I missed the memo that knees are not in the back of your leg, I am not sure what your seeing there. All Verts was guilty of there was trying to push Ramirez's leg out of his way after Vertonghen had passed the ball forward.So, did you have a chance to watch the highlights yet?
Anyone who thinks Vertonghen didn't totally 'game' Ramirez didn't watch closely enough.
Ramirez went to ground after being sandwiched between two players, as Verts walks past he literally knees him in the ass which Ramirez reacted to by scything him down. If you don't believe me, go to Last minute goals . com check out the extended highlights and skip to 5.50.
Obviously that's all the linesman saw (the scything part) and hence why he told the ref to send him off.
In my opinion that's gamesmanship and says a lot about the plight of our team that we need to resort to such tactics.
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http://www.nbcsports.com/soccer/premier-league/hull-city-tottenham-highlights-0