The agent of Douglas Costa admits Manchester United boss Sir Alex Ferguson wants to see the Gremio midfielder in trials before discussing a fee.

Cesar Bottega said: "There has been more contact (with Ferguson), even to know why he isn't currently playing.

"Ferguson has studied him closely. But it is clear he wants to confirm what people have told him up close."

For now, however, Gremio refuse to allow Costa to trial at Old Trafford.