The two Liverpool forwards not only excel on the pitch, but their humorous and flamboyant personalities have made them fan-favourites over the years.
One of the funniest aspects of their relationship is the fact that Mane simply cannot help but copy Firmino's celebrations.
Whenever the Brazilian pulls out a new eye-catching dance after finding the back of the net once again, Mane is usually close behind and mirroring his South American pal.
And it even seems that the bromance between the pair cannot be separated when they're on opposing sides.
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Brazil and Senegal met in a friendly early yesterday afternoon, with the two sides drawing 1-1.
So how did Mane decide to copy Firmino this time? Well, fortunately he didn't join in the celebrations for the Brazilian's opening goal in the ninth minute.
However, a brilliant image of Mane mimicking Firmino's stance before a free-kick popped up on social media and it's simply gold.
We don't care if it was intentional or not, we just want to see more of Mane copying Firmino.
If you've got the craving to see more, don't worry, below is a video of Mane's best Firmino impressions, including his woeful attempt at a spinning karate kick versus Porto.
They just never get old.
Last year, Mane tried to deny that he copied his teammates' celebrations, instead laughingly saying that they were mirroring him on the pitch.
"The fans deserve to know the truth," he told Copa90 . "Firmino copies me, not me copying him!
"The kick was me. We try it in training. He scored and I was behind him, and he did it.
"The dance with Philippe and Bobby was mine too!"
You're not fooling anyone, Sadio.News Now - Sport News