Finland 's Kerttu Niskanen went with Kalla as the two bridged the gap to Norway .
On the second classic leg , Sweden 's Charlotte Kalla set a blistering tempo out of the start to catch Norway 's Heidi Weng 8 seconds ahead .
Finland 's Kerttu Niskanen went with Charlotte Kalla as the two bridged the gap to Norway .
On the second classic leg , Sweden 's Charlotte Kalla set a blistering tempo out of the start to catch Norway 's Heidi Weng 8 seconds ahead .