The pair were awarded the overall 2023 Canadian Hunter Derby Championship, while a Royal Dressage Showcase also wowed the Royal crowd.
The leaders hold fast to their spots at the top of the leaderboards, while others have made significant leaps up the world rankings.
Barker piloted her own Cheers, who is sired by Canadian-owned stallion Cabardino, to the championship title, and Troubador to reserve.
The Belgian rider rode Bond Jamesbond de Hay to victory in the third leg of the Longines FEI Jumping World Cup Western European League.
The opening weekend of the Royal Horse Show was an exciting one, with wins for Phillip Dutton and Quasi Cool and Taylor Brooks riding Spectre.
The German rider took the second leg of the FEI Dressage World Cup Western European League with a winning score of 83.415%.
The Irish rider topped a field of 28 aboard James Kann Cruz to take the pinnacle event at the 140th National Horse Show.
Sam Pegg and Jay Hayes also earn an invitation into the CSI4*-W international division at the Royal Horse Show in Toronto.
He was flanked on the podium by US riders Kent Farrington and McLain Ward as the Pan American Games equestrian events came to a close.
The action got underway with the Henry Equestrian Canadian Show Jumping Championship and Mad Barn Indoor Eventing Challenge.