New Delhi, Oct. 15 -- Two exciting World Cup matches in Visakhapatnam, two chases that set the pulse racing, and in the middle of it each time was South Africa's Nadine de Klerk. Twice in the span of four days, the 25-year-old from Pretoria walked out with South Africa teetering and walked back having sealed the win with a six. "It's not good for my heart," she laughed after the second game, against Bangladesh, "but I do love being in a pressure situation." If South Africa's campaign in this tournament has been defined by the ability to hang in when the odds are stacked against them, then de Klerk has played a crucial role in it. The first chase was bigger, as the win came against India. Against the co-hosts, SA were 142/6 chasing 252, and ...