The German international has no doubt that Firmino will light up Anfield for many years to come, but has urged the Anfield faithful to be patient with the summer signing.
Just two days after new Liverpool manager Jurgen Klopp picked the Brazilian forward to lead the line in the 3-1 win against Chelsea, Firmino's team-mate, Emre Can, has backed the striker to succeed at Liverpool - if only he works hard and follows in the midfielder's footsteps.
Like Can, Firmino has suffered with some injury problems since moving to Anfield from the Bundesliga, and a niggling back injury ruled the Brazilian out for a month.
The ex-Hoffenheim man- who hit an impressive 32 goals in his final two seasons at the German club- has also had to deal with a switch in tempo and physicality.
However Can, who is only too aware of what Firmino is going through, believes that he is over the worst of the difficult acclimatisation period.
“He is a great player and scored a lot of goals and made a lot in Germany,” Can told the Liverpool Echo, keen to remind Liverpool fans of Firmino's pedigree.
“He just needs time. People need to be patient with him then he can progress. It’s not easy to come into the English league, everything is quicker and more physical.
"I know myself that it’s difficult when you pick up an injury after arriving at a new club. It’s the worst time because you’re trying to make a good impression.”
Can is in a very good place to offer the Brazilian some advice, though, having been in his shoes only twelve months ago.
“It happened to me last season when I was on international duty and it took a few months to recover and get in the team,” he added.
“You need to learn about that and the referees too. Sometimes they don’t whistle when you expect it. Instead they let the game flow. You might think it’s a foul but everything continues.
“Personally, I like that. It’s much better than a stop-start game. But players who are new to England need time to adapt to it.”