The arrests took place in the early evening in the city's red light district, a popular destination for visiting tourists, famed for its bars and legal brothels.
"Most of the people arrested were Ajax supporters," said Marjolein Koek, spokeswoman for the police.
"Most of them were arrested for public violence.
"Everything has calmed down now, and most of the supporters have gone to the stadium," she said, adding that police would decide whether to bring charges after further investigation.
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