Spotted checking into the Hotel Victor yesterday, the David Beckham of polo players, the face of Ralph Lauren, Nacho Figueras, in town for this weekend's 5th annual Miami Beach Polo World Cup. According to some yentas out there, Figueras, whose wife Delfina Blaquier is preggo with their third child, is next on Madonna's hit list of married men with pregnant wives with whom she's allegedly having a fling. The rumors started when Nacho gave Madge some polo lessons not so long ago. It was during that lesson, say the yentas, that the pop star decided she'd try to go for yet another unattainable and try to adopt--er, woo, the comely player. Sounds fishy, sort of, and, besides, who else would someone like Madonna take polo lessons from, Tommy Lee Jones? We think not.