Heerenveen have advanced to the quarter-finals of the Dutch Cup following a 3-0 away success over Feyenoord.
Feyenoord came into the game in poor form after losing four of their last five league matches.
That poor run looked set to continue after Viktor Elm broke the deadlock on 37 minutes.
The game could have gone either way but Elm's second and a third from Roy Beerens late on completed a comfortable victory.
De Graafschap progressed at Dordrecht's expense courtesy of a 1-0 win.
Jason Oost's successful penalty on 71 minutes was enough to see the Eredivisie side through.