Liverpool have completed a loan deal for Schalke's Turkey central defender Ozan Kabak.
The 20-year-old joins the Reds until the end of the season, with the club also having signed Preston North End's Ben Davies for £2m.
Marseille's Duje Caleta-Car was also a potential target, with the Reds exploring a number of options in defence because of injuries.
Liverpool have an option to buy Kabak for £18m - with add-on clauses - at the end of the season, but do not need to activate it until June.
For now, they will pay a £1m loan fee now with the potential for an extra £500,000 based on games played and how they fare in the Champions League.