Cristiano Ronaldo says Nani and Anderson will make an immediate Premiership impact.
Manchester United agreed deals totalling around £30million for the young Portugal-based pair earlier this week.
And their new team-mate Ronaldo believes despite their tender years they'll be ready to go straight in at the Old Trafford deep end.
Winger Nani came from Ronaldo's old club Sporting Lisbon, while attacking midfielder Anderson arrives from Porto.
And Ronaldo, who made the move from Portugal to England in the summer of 2003, believes they can both follow in his successful footsteps.
He told The Sun: He said: " can only say that United will be stronger because they have signed two great players.
"Aderson and Nani are phenomenons and the side will be improved a lot by their participation."
Ronaldo added: "I'm really happy that I will have Nani and Anderson as team-mates. They will be very welcome at Manchester United."