A Cairo court on Monday sentenced four members of the Ultras White Knights, Zamalek football club's hardcore fans, to three months in prison on charges of assaulting club chairman Mortada Mansour.
Six other Ultras were acquitted of the charges.
The charges relate to an incident in October when Mansour was allegedly attacked by fans who threw acid at him.
After the incident, the White Knights released a video apparently showing an assault on Mansour that was offensive but did not involve acid.
In the video, Mansour appears walking on the pavement next to Zamalek Club. A young man wearing a hoodie slowly approaches him from behind and slaps him on the back of his neck, a particularly insulting gesture in Egyptian culture.
Mansour has been involved in several bust-ups with the team's fans since being re-elected as Zamalek chairman in March for a third stint in charge of one of Egypt and Africa's most successful outfits.
The Ultras White Knights initially blamed him for not doing enough to coax authorities into lifting an ongoing crowd ban in domestic competitions before the feud dramatically escalated, with Mansour branding the fans a "terrorist group" bent on stirring up chaos in the country.
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