Sassuolo sporting director Giovanni Carnevali admits Barcelona are watching Domenico Berardi and Sime Vrsaljko.
Carnevali says Barca chief Ariedo Braida has made multiple recent visits to check on the pair.
He stated: "(Ariedo) Braida has been several times to see our games.
"Berardi and Vrsaljko are two interesting players and they are admired and followed by Barcelona.
"At the beginning we set the course to keep Berardi and Vrsaljko and we did. Our goal is to keep the best players."