Krisztian Nemeth scored the lone goal 0 defeat of De Graafschap at the Mandemakers Stadion on Saturday, sending the visitors to the bottom of the Eredivisie table.
Nemeth's goal came 12 minutes from time, helping RKC secure its third win from its last four league contests. RKC sits eighth on 34 points, while De Graafschap goes bottom on 16 points after its third successive loss.
Excelsior claimed a 2-1 win over Roda on Saturday as Rangelo Janga opened the scoring. An own goal from Jagos Vukovic saw Excelsior's lead doubled in stoppage time before Sanharib Malki quickly netted a consolation goal.
NEC extended its unbeaten run to four games on Saturday with a 2-0 win at Venlo on Saturday as the visitors grabbed goals from Leroy George and Lasse Schone.
And on Friday, Vitesse claimed a 2-0 victory over 10-man Heracles thanks to goals from Wilfried Bony and Renato Ibarra.