Leeds and Celtic are thought to be keen on signing the Benfica defender Branimir Kalaica.
According to Daily Mail, the Whites are looking to strengthen their defence ahead of a return to the Premier League and the Croatian defender has been identified as a target.
Watford are thought to be keen as well.
It will be interesting to see who comes forward with an offer now. The report claims that Kalaica is highly rated in Benfica but the 22-year-old could be tempted to move if there is a chance of first-team football.