The likes of Liverpool, Chelsea and Inter Milan have all been credited with an interest in Firmino after watching him in action this season.
The 22-year-old has been a stand-out performer for Hoffenheim with 13 goals and nine assists in 24 games this term and his performances have not gone unnoticed across Europe.
Firmino has just over a year to run on his current deal, but Hoffenheim manager Markus Gisdol says the club will do everything to ward off interest in the Brazilian.
"Of course, we are well aware of all mechanisms of the football business," Gisdol told Bild.
"But good players we have under contract and are a perfect fit to our tactics are players we basically want to keep at our club.
"And Roberto has a contract at our club (beyond the end of this season)."