In life, everything can be distilled down to chart form. It's a truism born of the PowerPoint age.Each week we will examine some pressing event or trend via the easy-to-follow form of putting a chart together that explains things. Today's subject: Serena Williams.Houston's Serena Williams made nationwide headlines - and not in the usual "good" way - with an over-the-top rant at a small, unprepossessing line judge at the U.S Open. It wasn't a lengthy monologue, but the best threats are succinct,
