The Los Angeles Times (Mark Heisler) reports: Kobe Bryant, who lives for one-on-one challenges, went at it with former Trojan and soon-to-be Memphis Grizzlies rookie O.J. Mayo, a member of the U.S. Select team, last week in Las Vegas. “Kobe completely shut him down in the beginning,” said U.S. managing director Jerry Colangelo. “But the longer they went, the better Mayo got.” Bryant already knew Mayo, who attended his camp last summer, and already thought highly of him. “I think the world of him,” Bryant said. “I think he’s extremely talented. I think he has a great overall game that a lot of young players don’t have in terms of skills. He can handle, he can shoot, he can pass, he’s fast, he’s quick, so that’s the whole package.”