Austrian ski jumper Stefan Kraft won his third World Cup title with victory on the giant hill in Norway’s Vikersund on Sunday while Nika Prevc won her first overall prize as women’s ski flying made a successful debut. American Jessica Diggins and Norwegian Harald Østberg Amundsen also secured overall World Cup glory in cross-country skiing’s finale in Falun in Sweden. The 30-year-old Kraft has dominated this season and his triumph over 244.5 metres for 256 points in the one-off jump in Norway also extended his lead in the Raw Air series, which he later secured. Kraft, who also tasted overall W…