©Getty Images This is what it took to down Serena Williams at the Australian Open; passion, conviction and poise, it's all here. There was a lot of D across the net, and likely in Stephen's head. I'm told that she grew up idolizing Williams. Despite it all, the young gun dug deep and rose above. Next stop Victoria Azarenka. Get the look: Can't really because Stephen's kit is all custom Under Armour (UA) for her/by her. PIctured is the Sloane Sweet Spot Tank, Shadow Visor and Wristband. Her skort has custom detail as well and the shoes...sorry guys, no to these exclusive, custom-built UA MicroG tennis shoes too. Yes I did/do covet it all. Similar items at retail are the UA Inner Intensity Tank and Basic Skort. The wristband and visor are available but not in the colors that served Sloane so very well. A budding designer like Maria? So far so good but we want it too! Find some of it at UnderArmour.com, Tennis-Warehouse and tennis retailers selling UA.