PSG coach Carlo Ancelotti is convinced of the quality of Lucas Moura.
PSG left Manchester United boss Sir Alex Ferguson bewildered after outbidding them for the Sao Paulo star.
Ancelotti said: "He is the only player to arrive during the transfer window. This is a great player, he is young, he will be the future of the club.
"He has many qualities and it will be no problem to have a good relationship with the other players.
"We are happy because it was not easy to recruit a player as important as him, and he will help the team do better."