Speculation surrounding the England international's future has been rife after retired United boss Sir Alex Ferguson revealed that Rooney had requested a transfer away from the club.
|14/1||Wayne Rooney is 14/1 with Coral to join Barcelona
“I know he has what's needed to be one of the three best players in the world. He'd fit well with Barcelona,” Pique told Sport.
“He can adapt to many positions. He's best as the centre-forward, but we have seen him on the left or right side.
“He is very versatile, strong, fast and has great technique. I don't think he would have any problems adapting.”
Rooney, who scored 12 league goals in 26 appearances last season, returned to Carrington for pre-season training on Wednesday ahead of talks with David Moyes to decide his United future.