This week we saw Ms. Sandberg go on a tear as a one woman tour de force in multiple media venues.

FORBES: Why Facebook Shares Will Rise Just Like Amazon's Did

The worrisome sign for Azarenka is that she needed to go on such a tear after falling behind by a set and 4-0 to the world's 105th-ranked player.

WSJ: Victoria Azarenka: One Is a Lonely Number in Women's Tennis