Chelsea starlet Lewis Baker will spend next season on loan at Dutch Eredivisie side Vitesse Arnhem.
Vitesse beat Heerenveen 5-2 as they claimed a Europa League place with a 7-4 aggregate win in the post-season play-offs.
AZ claim a Europa League place at the expense of Feyenoord, who were consigned to the play-offs for a place in Europe.
Michiel Kramer netted a late winner in a 1-0 victory over Vitesse which all-but confirmed Den Haag's Eredivisie status.
Champions Ajax delayed PSV's impending Eredivisie title win for another week as they won 2-0 away at Heracles Almelo.
Five-star PSV close in on Dutch title after comprehensive victory at FC Twente, while Heracles grab dramatic late win