Belgium's former number one tennis champion and UNICEF Ambassador Justine Henin speaks during a media conference regarding childhood vaccinations in developing countries at UNICEF headquarters in Brussels, Thursday Sept. 10, 2009. Amid the resurgence of Belgian tennis, Justine Henin has moved from retirement, to confirming she won't come back, and now, to refusing to discuss her future. As UNICEF goodwill ambassador, she now tries hard to stay focused on tetanus vaccinations for mothers and babies in developing nations.