Bari chief Guido Angelozzi has revealed AS Roma have concerns Adriano will not return from his break at home in Brazil.
"The Okaka transfer is tied up in Adriano's return to Italy. Roma are stalling a bit because they are afraid Adriano won't return from Brazil," said the Bari chief.
"He was meant to arrive before December 30, then due to red tape issues with his son's passport the return was moved to December 31.
"From the news I'm getting, the player could even arrive on January 6. This is really starting to irritate me, as Okaka wants to join Bari and everyone is ready, but concerns over Adriano are stalling the transfer."