Canada, Italy, Norway and Russia got the World Men's Curling Championship underway with victories in the opening session in Calgary, Canada.
The hosts, who are the record 36-time World Champions, saw off a resilient challenge from Scotland, with Bruce Mouat's team taking 2-1 and 5-2 leads before scores of two in the sixth and seventh ends turned the tide for Canada as they went on to win 9-6.
"We were resilient in that game," Canadian skip Brendan Bottcher said.
Mouat and Dodds claim World Curling Mixed Doubles gold in Aberdeen
"We battled hard and that was a big win for us. We got some momentum, even throughout that game it felt like we picked up momentum as the game went on."
Elsewhere, Italy hammered South Korea 7-1 while Russia saw off the Netherlands 8-5.
Meanwhile, 2014 World Champions Norway got their campaign underway with a nail-biting 7-6 victory over Denmark, which saw Norwegian skip Steffan Walstad spare his blushes in the extra end, having jammed a stone in the tenth end to give the Danish team a steal.
The event is the first in the qualification process for the 2022 Winter Olympics, with the top six placed nations qualifying directly for Beijing.
Scotland gear up for semi-finals in style
'Still work to do despite Olympic quota qualification,' says Mouat