The Navy, which has all three sons of the president as players, was defeated by Kandy Sports Club in the match.
Failing to accept the defeat, a group of Navy men had assaulted the spectators, said Kandy SC president Lasantha Wijesuriya.
It was the Navy physiotherapist who had begun all Navy supporters too beat up the spectators and drove them away from the grounds as the winners were celebrating, he has told BBC Sandeshaya.
It had taken place after President Mahinda Rajapaksa and first lady Shiranthi Rajapaksa had left the venue after the match, while their three sons, as well as the large police contingent present, looked on as the assault was taking place, he charged.
Last year too, the Navy beat up Kandy SC players, but police were yet to take any action, Mr. Wijesuriya said.
However, Navy spokesman Commodore Kosala Warnakulasuriya has rejected the accusation, saying Navy players were injured when spectators attacked them.