Ziyech, the left-footed Moroccan international, played a starring role in the Dutch club's run to the Champions League semi-finals.
The 26-year-old has enjoyed a remarkable campaign in Amsterdam, scoring 21 goals and registering 24 assists for Erik ten Hag's side as they completed a domestic double.
Scouts have flocked to the Johan Cruyff Arena to keep tabs on the club's star names, and Ziyech has impressed.
Manchester United, Arsenal and Liverpool have all been watching him - as have Bayern Munich and Borussia Dortmund, with the pair eyeing him as replacement for Arjen Robben and Christian Pulisic respectively.