Canada's Denielle Gallagher and Come Back De Massa place 3rd as the venue hosts its third international dressage competition of the year.
Ten teams will battle it out at the World Equestrian Center; Ireland will seek to repeat last year's win, following victory in the Abu Dhabi opener.
The American on a hot streak trounced the competition in the CSI4* at WEC-Ocala aboard the fleet-footed mare Toulayna.
Nine teams took part in the $150,000 event at Wellington International, with Canada finishing just off the podium behind US, Ireland and Belgium.
The Belgian rider won this €575,000 event for the second year in a row; this championship series now moves to Mexico City.
The Canadian rode Finnländerin to score 75.325%; Kevin Kohmann won the class riding Dünensee with a new personal best of 79.24%.
Set to be the largest in the region, the season kicks off on January 1, 2026 and carries total prize money of 10 million euros.
Canada's Mario Deslauriers rode two horses in this class at WEC-Ocala, placing 9th with S & L Quatro van de Meerputhoeve.
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The seven-time Olympian says the multiple frames-per-second capability of modern cameras can misleadingly convey that open mouths are a constant state of affairs.