Liverpool announced the second most expensive acquisition in the club's history with the signing of Firmino, and Hamann is encouraged by the deal.
Former Liverpool midfielder Didi Hamann has been comparing new signing Roberto Firmino to other stars within the Liverpool team after he completed a move thought to be worth up to £29 million (per the BBC) from Hoffenheim - subject to a medical and work permit being completed.
Hamann told the Liverpool Echo that he thinks the Brazilian has certain attributes that are stronger than those of Adam Lallana and fellow countryman Philippe Coutinho: “Physically, he's stronger than Coutinho and he's more direct.
“When he travels with the ball, he can beat a player one v one.
“Coutinho and Adam Lallana like to set things out and bring others into play. But Firmino is more direct and he will look to finish himself.
“He will create chances for others but he will also score goals. He has good pace and can beat a player. Liverpool lacked pace going forward last season.
“I think he might be more effective out wide for Liverpool. I think he will be more effective than a Coutinho out there.
“His pace is a big asset and on top of that he's very skilful and can finish. He might play some games through the middle but I think out wide will probably be his position.”
The fee Liverpool have paid for Firmino has excited many fans, given the intent it appears to show from the club after a disappointing season last term.
The Reds are expected to make a lot of money out of the sale of Raheem Sterling, with Manchester City interested in the unsettled 20-year-old - per the Daily Mail. Some are even seeing Firmino as a replacement for Sterling.
There is a lot of talk about his versatility, which is something that will please manager Brendan Rodgers given that when his sides are at their best, he can have players moving into several different positions throughout a game and manage to make them look accomplished.
Given there is no Champions League football to offer new recruits at Anfield next season, attracting players of this calibre may have been a lot more difficult this summer as a result - and Hamann is among those who didn't expect this kind of deal to happen.
The German added: “I think people have been a bit disheartened over the past six weeks or so.
“Expectations had gone down and I was worried that Liverpool would go into the new season on a low.
“We've needed a spark from somewhere and this signing has given supporters the boost they needed."
Now there is hope from fans at the club that this isn't the end of the bold signings as there is a real desire for the team to play the exciting, free-flowing attacking football that got the Reds so close to ending their title drought in 2014.
Some will warn that after another busy summer of activity things could end up like last season, when the club brought in several players and the end result was disappointing. The signing of Firmino feels a little different, but with five players in and more expected, some will be cautious.