The outstanding young duo Anderson and Nani were captured from Porto and Sporting Lisbon respectively and new team-mate Cristiano Ronaldo has described them as "phenomenons".

He told The Sun: He said: "I can only say that United will be stronger because they have signed two great players.

"Anderson and Nani are phenomenons and the side will be improved a lot by their participation."

Brazil coach Dunga has picked midfielder Anderson for his Copa America squad this summer and is also lavish in his praise.

He told The Daily Mirror: "Anderson is an exceptional young player who will be a star at next month's Copa America. He has pace, great footwork and likes to run at opponents.

"He's a great talent with a terrific attitude and he has no fear. With his strength, power and pace he can be a big success in Europe and one of the very best in the world in years to come."

And Arsenal's Brazilian midfielder Gilberto Silva is not looking forward to facing the 19-year-old sensation.

He told the tabloid: "When we played Porto you could see then that he was really fast and had great skill.

"He is also strong, which is important for any forward in the Premiership. I think Manchester United have done a good piece of business by signing him."