The 30-year-old has turned into a serious player under the watchful eye of the German.
Firmino has found the back of the net 101 times and registered 77 assists in 335 appearances for Liverpool's first-team.
The Brazilian has also helped the club win six major trophies and the Community Shield.
Therefore, we weren't surprised to hear Firmino speak so positively about Klopp during a recent interview.
As quoted by AW's Twitter account, he told the Liverpool Echo the following: "Having him with us today is amazing. He never stops giving me advice. He's a massive father figure for me here at Liverpool. I'm so grateful to play under and be coached by a great leader.
"I thank him for everything I've learned. I will always be highly complimentary for everything he's done for me and also the club.
"Whenever we came up against Dortmund, Jurgen would routinely be in the middle of the pitch closely observing opposition players warm up. I'd look at him and think: 'What's going on, is he trying to intimidate us?'
"I found it interesting and it was always great to come up against that Dortmund team."
Honest thoughts on this man so far this season? 👇 pic.twitter.com/uA62Zt564O
Anfield Watch Verdict
Klopp, who has been at Anfield since 2015, has had a huge impact on Firmino's career. It has been an honour to watch the forward represent the club for the past seven years.
Firmino is a very complete player. There isn't much the Brazilian can't do.
Firmino's contract expires at the conclusion of this season. With that being the case, we have no idea where his long-term future lies. Only time will tell.
We wish Firmino all the best for the remainder of the campaign.