June 6 (UPI) -- Dominating victories by Desert Crown in the Derby at Epsom Downs and by Vadeni in the French Derby at Chantilly had the weekend racing crowds buzzing about a potential showdown between the colts at season's end in the Prix de l'Arc de Triomphe.
Those races, plus a dramatic upset by Tuesday over Emily Upjohn in the Oaks, were the highlights one of the pinnacle days on the world racing calendar and promise much more excitement in the months to come.
Back in North America, much of the top action was on the turf and there were some upsets at Churchill Downs, Belmont Park, Santa Anita and elsewhere.
But there's only one place to start the conversation.
Massive days by jockeys Ortiz Jr., Hernandez highlight Memorial Day weekend racing
