Top North and South American polo players, including US champ Nic Roldan and Argentine heartthrob Facundo Pieres, will face off today in Wellington, Fla., at the High Goal All-Star Polo Challenge. In a display of horsepower, 50 Ferrari owners will also embark on a road rally around horse country, then return to the field. Expected are Georgina Bloomberg, Jessica Springsteen, Sam and Libby Edelman, Hannah Selleck, Kelly Klein, Mark Badgley and James Mischka.