Arthur and Miralem Pjanic have signed their contracts with Juventus and Barcelona, respectively, with both teams expected to make an official announcement regarding the midfielders on Monday.
The two clubs agreed a deal earlier this week that will see Arthur leave Camp Nou for Turin for around €70 million (£63m/$79m), while Pjanic will move in the opposite direction for a €60m (£55m/$67m) fee.
Both players underwent medicals at their respective new clubs on Sunday afternoon before putting pen-to-paper on their contracts.
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Arthur has signed a five-year deal with Maurizio Sarri’s side, which will see him earn a basic salary of €5m per season, going up to €7m (£6m/$8m) with bonuses.