Barcelona have reached an agreement with Sassuolo for the transfer of teenage Paraguay striker Tonny Sanabria to the relegation-threatened Italian club the same day Alberto Malesani was named their new coach.
The Primera Division champions said the deal for the 17-year-old, who has not made a first-team appearance for the Catalan giants, could reach €12m.
A Barça statement read: "Tonny Sanabria will join Sassuolo after reaching an agreement for €4.5m which could be 12 depending on the performance of the player and his future market value.
"The process to purchase the player started with Roma, but the transfer was closed with Sassuolo."
Sanabria made his debut for Barcelona B this season after joining the club's youth academy in 2010 and has played a total of ten matches in Spain's Segunda Division for the reserve side, scoring three goals.
He made his international debut for Paraguay during qualification for this summer's FIFA World Cup™.
Sassuolo are third from bottom in the Serie A standings with 17 points, one adrift of safety after 21 games played.
Earlier on Wednesday they appointed former Genoa manager Alberto Malesani as their new coach.
Malesani takes over from Eusebio Di Francesco, who was sacked on Tuesday after 19 months in charge following the team's poor run of form.