Italian coach Serse Cosmi says Henrikh Mkhitaryan has been transformed as an Inter Milan player.

Cosmi admits he's amazed by the difference in the midfielder since his time with AS Roma.

He told Radio Serie A TV: "In his 3 years at Roma he only jogged, but the Inter guy now really runs.

"He's a different player: he runs and brings quality and experience.

"He's a devastating player."