Mathieu van der Poel soloed to the stage 4 victory at the Belgium Tour after a 36km attack on the road to Durbuy.
Thibau Nys (Trek-Segafredo) finished second on the day, while Casper Pedersen (Soudal-QuickStep) was third.
Van der Poel extended his overall lead to 40 seconds ahead of Søren Waerenskjold (Uno-X) and 53 seconds ahead of Pedersen.
“I think I have really good shape after the altitude camp I did with the team. Only the National Championships is on my schedule so far, so it will be only one race left, after tomorrow, before I go to the Tour,” said Van der Poel.