Chelsea midfielder Mason Mount scored again for loan club Vitesse Arnhem in their home defeat to PSV Eindhoven.
Mount came on as a second-half substitute to net a consolation goal in the 4-2 defeat.
Winger Hirving Lozano scored twice for PSV, as did forward Jurgen Locadia, who also scored an own goal.
It was Mount's second goal for Vitesse, where he is spending this season on-loan
Ajax are five points behind PSV after beating Willem II 2-0 on Saturday.