Norwegian star Johannes Hösflot Kläbo claimed a record sixth straight stage win at cross-country’s Tour de Ski while Katharina Hennig ended a long German winning drought with a first career victory on the women’s side on Saturday in Italy. Kläbo prevailed on the home stretch of a classic style 15-kilometres mass start race in Val di Fiemme to move one ahead of Russian Sergey Ustiugov who had won the first five stages in 2016-17. The multiple world and Olympic champion Kläbo now has the chance to complete an extraordinary sweep of all seven stages in Sunday’s finale and claim a third Tour de Sk…