Frank Rijkaard says Arda Turan can make a big impact at Barcelona.
Former Barca coach Rijkaard worked with Turan at Galatasaray.
He told Marca: "A huge talent, a massive heart and a great footballer.
"He's already shown as much at Atlético. He's hard-working and technically strong. Arda Turan can bring something special to this Barça."