Ajax recovered from going a goal down inside the first two minutes to ease past Cambuur 4-2 this afternoon.
The visitors were shocked when Sebastian Steblecki struck early on, but the Dutch giants responded through Arkadiusz Milik, who struck his first of the afternoon on 19 minutes.
Frank de Boer's team took the lead four minutes later when Davy Klaassen scored after good build-up play from Milik and Lasse Schone.
Poland international Milik then grabbed his brace on the hour mark before Anwar El Ghazi's deflected effort secured the points for Ajax 11 minutes from time, despite Bartholomew Ogbeche's late consolation.