Britos helped Watford nullify the Swedish striker during the club's 3-1 victory over United on Sunday.
He told Uruguayan radio station Sport890: "It wasn't the first time I played against him.
"I did so when he was at Inter and AC Milan. We were able to control him, as well as Rooney.
"He's a bit arrogant and gets annoyed easily. He really doesn't like being touched.
"But he's still a phenomenon. He's a very complete player and a great."