At first glance, Arthur might look a lot like Thiago Alcantara but on closer inspection it is the sidelined Liverpool midfielder who may be best placed to develop his new team-mate.
One of the biggest criticisms of Arthur, an atypical midfielder who lacks any sort of speed, is that he is ponderous on the ball and is akin to a Subbuteo footballer.
He has spent three bitterly unhappy years in Serie A with Juventus, where tactical and fitness doubts have blighted his reputation.
Liverpool needed bodies in midfield, particularly following the injury to Jordan Henderson in the 2-1 win over Newcastle, and a fit Arthur is a player who can be useful, but not a player capable of radically changing the playing pattern.