"He's not a winger. From the moment I came here he's worked in the middle. He's a player for the national team, in my opinion," said the former Portugal midfielder.
"He's made a lot of progress and he can be a much better player."
The Premier League's four representatives all face crucial matches in the final round of Champions League group games next month.
Arsenal were dealt a severe blow on Monday when it was revealed Francis Coquelin the injury the Frenchman picked up
For years, and years, and years, Tottenham Hotspur Football Club have fought tooth and nail to become a Champions League
Manchester United host PSV in the Champions League on Wednesday.
Juventus midfielder Claudio Marchisio is wary of a potential Manchester City backlash in Turin this week.