Nine arrests were made and multiple knives confiscated as officers were forced to use tear gas to break up the organised dust-up in the city’s famous Alexanderplatz.
Rocks were also thrown as the violence spilled into the square’s underground station.
Referring to the incident afterwards, the German Police Trade Union wrote on Twitter: “Influencers are negligent with their influence; it seems to be in fashion to inflame tensions simply to get more clicks and more followers.”
After weeks of goading each other, the pair arranged to meet in Alexanderplatz on Thursday evening and encouraged their fans to turn up to support them.
It took police four hours to return calm, the Berliner Morgenpost reports. Criminal charges have been lodged against 13 people.
Writing on Instagram afterwards, Mr Al Amood, who has 14,000 online subscribers, claimed he had tried to speak to officers to deescalate tensions, but, he claimed, they “refused to listen”.
His rival, who has 250,000 YouTube followers, told fans he had been injured during the violence and wrote: “I need a break.”
His manager told the Morgenpost he did not believe he was accountable for the trouble.