You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Tennis' Serena Williams Plays Into HP's 'Hands' Q&A: Campaign's Latest Star on Endorsements, New Media By Beth Snyder Bulik, Published on August 27, 2007 0 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Register Now Already a member? Log in.