Ajax were level at the top of the table with AZ Alkmaar, with just nine games remaining.
Ziyech, who is set to join Chelsea on July 1st, was battling for a second straight Eredivisie crown, before the Dutch Football Association declared the season null and void as a result of the coronavirus outbreak.
The Moroccan international also added that he has been in discussions with Chelsea head coach Frank Lampard ahead of his move to Stamford Bridge.