Liverpool boss Rafa Benitez admits injuries to Jamie Carragher and Sami Hyypia could force him back into the market.
The Kop boss, who has also allowed young Argie full-back Gabriel Paletta to join Boca Juniors, is now short of options at the back.
Benitez said: "We are thinking about finding more players and maybe we will have to look at this situation again."