Arthur has joined Juventus from Barcelona in a transfer worth up to €82 million with Miralem Pjanic going in the other direction.
Pjanic will cost approximately €60 million.
Both players will remain with their sides for the duration of their respective domestic campaigns, while they will also be available for the Champions League in August.
Compared to Xavi in his first few months at Barca, Arthur stagnated over the past year but hte motivation for the sale is financial.
Barcelona needed to bring in approximately €70 million in palyer sales before June 30th.