Siem de Jong struck a hat-trick as champion Ajax moved three points clear at the top of the Eredivisie table with a thumping 5-0 win at 10-man Heerenveen.
Ajax cashed in fully after Heerenveen goalkeeper
It was also a fifth clean sheet on the spin for Ajax as its lead at the top grew thanks to a 2-2 draw between closest rivals AZ and FC Twente.
Jozy Altidore twice put the host ahead at AFAS Stadion but
Altidore opened the scoring in the third minute when he headed home an inswinging corner from
Altidore was on target again in the 71st minute but Bajrami - a second-half substitute - headed home
PSV Eindhoven's title bid suffered a huge setback as second-half goals from
Jan Vennegoor of Hesselink grabbed a late consolation for the visitor, but it was not enough to prevent Phillip Cocu's men finishing the evening seven points adrift of Ajax.
The result was equally crucial for the host, which boosted its chances of reaching the play-off places for a slot in next season's UEFA Europa League by moving level on points with eighth-placed NEC Nijmegen.
Feyenoord also dropped points in its title challenge after it drew a blank against Roda JC at the Parkstad Limburg Stadion.
In the other game, NAC Breda remains just five points above the relegation zone after losing 2-1 at home to Heracles Almelo.
The home side took the lead just before the interval through
Ninos Gouriye equalised in the 77th minute before