Werder Breman ace Diego remains hopeful of a move to Juventus.
Juve chief scout Renzo Castagnini has been a regular at Werder games this season, while sports director Alessio Secco has also made personal checks.
However, Juve coach Claudio Ranieri insists Diego's style of game won't fit into his system.
The midfielder said: "It is an honour to be wanted by a club as glorious as Juve."