Canadian retailer Loblaw is set for a battle with Wal-Mart, the world's largest retailer, following the US group's announcement that it will open up to 27 new stores in Canada by 2009 at a cost of 'hundreds of millions of dollars'. Key areas that Loblaw will focus on include organics, spoilage reduction and opening more No-Frills discount shops in western Canada, according to a Bloomberg report.