AZ Alkmaar showed why many pundits fancy them to challenge Holland's big three for the Eredivisie title this season by kicking off their campaign with an 8-1 spanking of NAC Breda.
Simon Cziommer scored a hat-trick, Danny Koevermans a brace while Joris Mathijsen, Stijn Schaars and Tim De Cler also got on the scoresheet.
Ronnie Stam scored NAC's goal when the score was 2-0 but Louis van Gaal's side have thrown down the gauntlet to champions PSV Eindhoven, Ajax and Feyenoord, who all play tomorrow.
An injury-time goal by Afonso Alves earned Heerenveen all three points from a five-goal thriller in The Hague.
The Brazilian midfielder capped Heerenveen's superb comeback with the winner at the death to earn a 3-2 victory.
Iwan Redan's 82nd-minute winner handed Willem II the ideal start to the Eredivisie season with a narrow 2-1 victory over Utrecht in Tilburg.
The hosts had fallen behind in the second minute to a Marc-Antoine Fortune strike but Mounir El Hamdaoui equalised in the 23rd minute with a penalty.
Redan, the former RKC Waalwijk and Roda JC striker, sealed the win for Willem when he converted a Kevin Bobson cross late on.
Excelsior's celebrations on returning to the Eredivisie were quickly dampened as visitors Roda JC took all three points with a 1-0 win.