Tonga captain Nili Latu said that Shaun Edwards' barbed comments were an "insult" to his players ahead of their match tomorrow.
Edwards, the Welsh defence coach, called for referee Mike Fraser to protect his players from the Tonga's indiscipline.
In their 38-18 loss to France last weekend, Tongan prop Sona Toumalolo was sent off for fighting and scrum-half Taniela Moa was sin-binned for elbowing hooker Dimitri Szarzewski.
But captain Latu responded angrily to Edwards' calls for the referee to not put up with any Tongan "nonsense."
"For me, that is an insult," the Tongan captain said.
"It is a contact sport and anybody who plays rugby, not only Tongans, Samoan and Fijians, bring that physicality into the game.
"It is something that we pride ourselves on. I think sometimes we do let it go to our head, giving away stupid penalties."
Latu has also called for referee Fraser not to be swayed by the Welsh defence coach's comments.
"It is important to say it is not going to stop us doing from what we do best, and we will leave it up to the referee," he said.
"He will call what he sees and hopefully it will be a fair match.
"We are looking for an entertaining game and I am sure Wales want the same game as well.
"Hopefully, the referee doesn't dictate the game or the outcome."
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