Casemiro joined United for an initial £60million fee.
The 30-year-old midfielder signed a four-year deal and is expected to bolster Man United’s struggling midfield this summer
“Very excited – I know perfectly his quality,” the United defender told the PA news agency. “He can bring this balance on the team and his mentality.
“He’s a warrior, so I think he will really enjoy the English football. I know him.
“I think it was a perfect night for him to meet Old Trafford because the atmosphere was absolutely amazing, and he brings a victory so it’s nice.”
Both Varane and Casemiro enjoyed a trophy-laden career in Madrid and the defender explains the main reason behind the Brazilian’s move this summer.
“He doesn’t need my help to make his choice,” Varane said. “I know exactly what he feels and why he’s coming here after what he lived in Madrid.
“He needs a new challenge. I know exactly why he chose this club.
“It’s a similar process that I had so obviously I wish him the best and I’m speaking with him a lot, but he didn’t need me to make his choice.”