The Netherlands maintain their lead in Nations League Group A4 after beating Poland in their last match.
After 13 minutes in Warsaw, Cody Gakpo reacted to Denzel Dumfries’ low ball into the box to give the visitors the lead.
At the hour mark, Steven Bergwijn’s curling effort gave Louis van Gaal’s undefeated team the win.
For the Netherlands to go to the Nations League finals next summer, they must win their last match against second-placed Belgium.
After beating Wales 2-1 on Thursday to keep their dreams of winning the group alive, the Netherlands are still three points ahead of Belgium.
Van Gaal’s team overcame Belgium 4-1 in their June matchup and has won four of their five group games.
To continue competing in the Nations League’s top division, Wales must defeat Poland on Sunday in Cardiff.