NBA Rookie of the Year Kyrie Irving issued a challenge to Lakers guard Kobe Bryant: play one-on-one.

Irving, the No. 1 pick in the 2011 draft who starred for the Cavaliers last season, approached Bryant with cameras rolling for Blue Planet, a Duke website, and SLAM Magazine during a Team USA shoot-around in Las Vegas.

Bryant smirked, trash-talked Irving relentlessly and ultimately accepted. He upped the ante a bit, too. Bryant said he will play Irving for $50,000. The loser will donate the sum to charity.

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