Ajax reduced the gap on Eredivisie leaders PSV Eindhoven to four points as they thrashed basement boys NAC Breda 5-0 at the Johan Cruyff Arena.
PSV battled back to snatch a 2-2 at Heerenveen thanks to Donyell Malen's goal in the fifth minute of stoppage time.
Luuk De Jong was PSV Eindhoven's hero as the Eredivisie leaders produced a concerted fightback to deny Utrecht victory.
West Ham have rejected an offer from Dutch club Heerenveen to take Reece Oxford on loan until the end of the season.
NAC Breda climbed off the bottom of the Eredivisie table after claiming a point in a 1-1 draw at home to ADO Den Haag.
All the latest news and rumours, with updates on the futures of Jose Mourinho, Gareth Bale and Mesut Ozil.