NEW YORK -- James Blake, Venus Williams and now Sam Querrey, some of America's leading lights, are already gone from the US Open.
But Jack Sock, at the age of 20, is into the third round. This shouldn't be terribly surprising.
You could see the kid they call "J-Sizzle" coming from a few thousand miles away. With the backward hat, the Nebraska heritage and that natural charisma, it's clear that Sock aches to follow his idol, Andy Roddick, all the way to the top.