Arthur was the late arrival at Anfield in the summer as Jurgen Klopp faced up to Liverpool's midfield reality.
A host of injuries that threatened to undermine their season with key personnel missing effectively forced the club's hand. The Brazilian, who has proven his credentials at Barcelona and Juventus, is now playing for another European giant - albeit on loan.
Arthur will spend the season on Merseyside, but once everyone is fit he will be battling for a start with established stars like Jordan Henderson, Thiago and Fabinho. There have already been contrasting reports around how the new recruit is settling in, with some suggesting the loan could be cut short.
