SAPPORO - Japanese teenage ski jumper Sara Takanashi soared to a record-stretching 15th World Cup victory Sunday, her second win in two days, stepping up her bid for gold at the Sochi Olympics. "I have nothing to worry about," the 17-year-old high school student said about next month's Sochi Games. "I want to continue making steady jumps." It was her sixth victory in seven World Cup events contested so far in the 2013-2014 season as she aims to retain the overall title she first won last year. Takanashi, who is 152 centimetres tall, jumped 97 metres in the first round to register the day's longest distance as snow continued to fall on the Miyanomori hill in Sapporo, northern Japan. Her second jump went 91 metres and she collected a total of 237.1 points.–AFP