The 22-year-old played a key role in Ajax winning a league and cup double last season in addition to reaching the semi-finals of the Champions League.
The Netherlands international has again been in impressive form this term, scoring 10 times and registering 11 assists in 37 appearances in all competitions.
Ajax will be in a strong position when it comes to any negotiations this summer, though, as the Dutchman has a contract with the Amsterdam giants until June 2022.
Manchester United and Inter Milan have also previously been credited with an interest. body check tags ::