The attacking midfielder scored for the German side, though they went down 4-2 to Mainz in the Bundesliga.
The 22-year-old is enjoying a fantastic season for Hoffenheim, scoring 13 goals in 24 appearances and creating 43 chances, according to Squawka.
His performances this campaign have been in stark contrast to last season, when he scored five goals in 33 appearances and created 40 chances throughout the whole of Hoffenheim’s season, in which they narrowly escaped relegation to 2.Bundesliga.
Hoffenheim, however, are hopeful of keeping their star player after their best season in recent years.
“Of course, we are well aware of all mechanisms of the football business,” Markus Gisdol, Hoffenheim’s manager, told Bild, with quotes translated by Sky Sports.
“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).”
Metro suggest Firmino could be available for around £12 million in the summer.