Feyenoord maintained their perfect start to the Eredivisie season with a 5-0 victory over struggling Roda JC 5-0 on Sunday.
Groningen thrashed Utrecht 5-1 on Friday to earn their first win of the season in the Eredivisie.
Luuk de Jong capped a 24-minute blitz as PSV stormed back to the top of the Eredivisie with a 4-1 win over NEC in Nijmegen.
Ricky van Wolfswinkel scored his third goal in four Eredivisie games for Vitesse Arnhem but it was not enough for victory against Utrecht.
Feyenoord continued their perfect start to the season and returned to the top of the Eredivisie with a 1-0 win at Heracles Almelo.
Swansea have criticised Dutch club Utrecht over comments they made in relation to the ongoing Michel Vorm transfer case.