Former coach Ivan Cleary was always a staunch backer of Vatuvei. If anything, Brian McClennan appears even more strident.
"Over the years, I've watched with humour when people have knocked a champion player and watched those champion players come back and turn around and laugh," McClennan said. "I'm tipping Manu to do that."
That said, Vatuvei is not really the type to laugh in the face of his critics. He's not even prone to getting too upset with match officials who routinely rule against him when he appears to have been the victim of some none-too-subtle stripping.
"I'm not too sure," he said when asked if he felt he received a fair go from referees.
"From where I am, there was one that was knocked out, I know that. But I should have secured the ball better.
"The other one, it is hard for the ref to get a good look at it when they are all on top of me.
"An arm just came out of nowhere and stripped it.
"It's sometimes tough for the refs, but in my head it was a bad call. But I've just go to keep on playing and get my mind back into the game."
McClennan said his key kick-returner was clearly being targeted, but Vatuvei also needed to improve his ball security.
"He is being targeted because they need to get four in to tackle him in the first place.
"It is a big thing now, targeting the ball.
"On the other ones - the pass drops - he is a big man and they were face-ball passes to him.
"He probably needs to recognise those opportunities a bit earlier and get moving a bit quicker and he'll be fine," McClennan said.