Sinckler was yellow carded for bodychecking Jacob Stockdale in the 60th minute of their Pool 1 encounter, a move many have labelled as needless and which has seen the young tighthead cop a lot of heat on Twitter.
He also seemed to have a back and forth with a number of the Ravenhill faithful while getting sent off and after the match.
60' | Kyle Sinckler will spend ten minutes in the sin bin after taking the man without the ball. 31-17 #ULSvHAR
— Harlequins ? (@Harlequins) December 15, 2017
— Graeme Gilchrist (@graemegilx) December 15, 2017
— Phillip Hutchinson (@012pip) December 16, 2017
— adrian eagleson (@adrianeagleson) December 15, 2017
@KyleSinckler seriously needs to get some self control. He keeps letting his teammates and us fans down. I love the guy but he's no good to anyone if he's not on the pitch…
— Zeb (@wizord_of_aus) December 15, 2017
— Nathan Jefferies (@NcjFloorfurns) December 15, 2017
I’d venture to guess that Hartley has had a hand in moulding Sinckler’s superb sporting temperament…#twotwats
— Mark Breen (@mark_breen) December 15, 2017
Why did Kyle Sinckler just do that? presumably Harlequins will transfer list him now. he seems a liability
— Dreamer (@Daydreamer1756) December 15, 2017
We need to talk about Kyle Sinckler.
— Michael Hirst (@hirstmike) December 15, 2017
Pretty brain dead play from Sinckler there
— huwscarlet (@huwscarlet) December 15, 2017
Sinckler responded in a rather level-headed fashion, and thanked his trolls, branding their ‘abuse’ refreshing.
I do love twitter and all the abuse I get on here it’s refreshing ?
— Kyle Sinckler (@KyleSinckler) December 16, 2017
“I do love twitter and all the abuse I get on here it’s refreshing,” he wrote, and received plenty of support, even garnering the praise of a former All Black prop.
It means they want to be doing what you’re blessed to do. Use it as fuel and just keep doing you bra! Love your work??
— Neemia Tialata (@NeemiaTialata) December 16, 2017
— Rhys Webb (@RhysWebb_9) December 16, 2017
In October Harlequins defended the tighthead after he was banned for sevens weeks. The Harlequins prop was cited for allegedly making contact with the eye and/or eye area of Northampton Saints’ Michael Paterson, during the second half of the match between Northampton and Harlequins on the 30th of September.
Harlequins Director of Rugby John Kingston commented: “Despite Kyle’s unfair public reputation he actually has a very good on-field disciplinary record.
At the time, Sinckler himself stated: “I accept the outcome of the hearing and wanted to go on record to say I am sorry that I have let my team mates down, but more importantly I feel terrible that anyone would think I would deliberately gouge an opponent. That was never my intention – it was a genuine mistake and an act of recklessness on my part.
“I will spend the next seven weeks working hard on my fitness and rugby to ensure that when I am able to get back on the field I am fit and ready to do so and make the best possible contribution to Quins.”
Presumably still a work on for the heavyweight frontrow.
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