This ugly-looking tackle from Wales centre Hadleigh Parkes went overlooked by match officials, much to the dismay of England fans on social media.
Some supporters have suggested that this challenge led more with the shoulder than the hit that saw the England centre dismissed late one.
'Why wasn’t that a red card led with shoulder more intent than Tuilagi,' one fan wrote.
Another said: 'With force, contact to the head, no mitigation = red. Or just ignore it..'
Although England beat Wales 33-30 to capture the Triple Crown, Eddie Jones was clearly furious with the decision to send Tuilagi off.
“I usually don’t comment on decisions, but I find this bizarre and ridiculous. I don’t see how you can tackle a guy now. It’s absolute rubbish.
“There is no common sense shown. I don’t know what Manu is supposed to do in that situation.
“I don’t now how he is supposed to tackle the guy. How else do you tackle if you don’t tackle with your shoulder? The guy is literally half a metre off the ground.
“Manu does everything he is supposed to be doing. He gets red carded. Come on. You can’t tackle any more.”
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Greenwood followed his father Dick into an England shirt. While his father was a prickly back row player, the younger Greenwood was one of the finest centres to grace the England midfield.
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