Riding Brego R'n B in their first World Cup victory, the pair edged Germany's Rene Dittmer and Corsica X over Bernardo Costa Cabral's course.
The Irish rider guided the speedy mare Chardonnay to victory to claim the early lead in the North American League standings.
The Group C region qualifier took place in Prague (CZE); qualification continues at the FEI Jumping European Championship in Milano.
The victory marked the second straight in Falsterbo for the Danish in this final leg of the FEI Dressage Nations Cup™ 2023.
Germany, Denmark and Great Britain battled for top honours in the FEI Dressage Nations Cup, with a number of heavy hitters leading the teams.
Morgan Barbançon and Habana Libre A led a dominant French performance to mark the country's first win of this event in the Netherlands.
In that nation's first outing of the 2023 FEI Dressage Nations Cup season, they edged the Netherlands and Germany with strong scores.
The last NAL qualifier before the Final in Omaha took place at the Live Oak International over a course designed by Olaf Petersen Jr.
Just 500 days remain until the XXXIII Olympiad, and countries are gradually running out of opportunities to qualify.
An international field of vaulters will join top dressage and show jumping competitors when the Finals kicks off April 4th in Omaha.