Newcastle are considering a move for Valencia defender David Navarro, according to the player's agent.
The Magpies were linked with the 26-year-old last summer but are now set to renew their interest.
Reports in the Spanish press indicate that Navarro could be heading to The Premiership in January for a fee of around €5 million (£3.3 million)
Agent Maria Orobigt said: "Newcastle are searching for a central defender and have several men on their list.
"But still there are several aspects to be considered and I personally view it as a very complicated exit."
Navarro has not been a regular in Valencia's starting XI this season but is still attracting attention from across the continent.
Deportivo La Coruna have questioned Valencia about his availability and are rumoured to be very keen on signing him.
Sky Sports.com
