Yussif Raman Chibsah is back at Sassuolo after the newly promoted club agreed a co-ownership deal with Parma.
The midfielder only returned to Parma on a permanent basis in the summer after he spent last season with Sassuolo in Serie B.
It is understood that the deal for former Juventus youth team player, now a Ghana international, is worth around €2.5m.
The 20-year-old scored twice in 28 League games for Eusebio Di Francesco’s side during the 2012-13 campaign.