Thomas Vermaelen has emerged as a target for Liverpool, though they face competition from a Premier League duo and and a Turkish club.
Since his move from Arsenal, the Belgian has struggled for game time with the Catalans, having had his opportunities constantly halted by injuries.
At 30 years of age, there are still some years left for the ex-Gunner, who moved to Barca in August 2014 for a fee of £15million.
His next appearance for Belgium will be his 50th for his nation, but Vermaelen has featured in just 10 La Liga games this season, amassing just over 500 minutes of playing time.
Despite having three years left on his contract, rumours state that his time is up and Luis Enrique is willing to sell the defender.
Liverpool will however have to battle Chelsea and West Ham for his signature, according to the Daily Express, while Turkish outlet Fanatik state Besiktas have already entered negotiations with the club.
Vermaelen did reveal last year that he was shocked the European giants wanted to secure his services.
“I was stunned, to be honest, in the same way that I was surprised when I was given a chance in the first team at Ajax as a youngster and when Arsenal came calling a few years later,” Vermaelen told the December 2015 issue of FourFourTwo.
“It’s every footballer’s dream to play for such big clubs, so of course I was excited. My situation at Arsenal helped to speed up the negotiations. I only had one year left on my contract, so it was their last chance to receive a transfer fee. And since I hadn’t played much, they weren’t really reluctant to let me go.”