The mentioned source assured Barcelona are scouring the market in search of Andres Iniesta's replacement, and fellow Spain international Ander Herrera could fit the bill.
Ernesto Valverde has a strong squad at his disposal, but he wants to bolster his ranks in January. Barcelona believe to have found the perfect reinforcement for their midfield in Herrera who, at 28, still has his best years ahead of him.
Added to their long-standing interest in Coutinho, which Barca intend to pursue in the winter, 'The Sun' reported that the Catalan giants will launch a bid to land the former Athletic Bilbao midfielder.
A key figure in Jose Mourinho's side last season, Herrera has been relegated to playing second fiddle to new signing Nemanja Matic. A succulent offer from the Camp Nou could convince the Spaniard to return to La Liga.