**Edinburgh coach Mike Blair believes the club’s Challenge Cup opener against Saracens will serve as a gauge of his side’s progress this season.** \n\nThe men from the Scottish capital have made an impressive start to the campaign, losing only one of their opening seven matches in the United Rugby Championship and sitting second behind Leinster heading into continental competition. \n\nEdinburgh are on a four-match winning run since their 20-20 draw with the DHL Stormers in Round 3 and Blair is excited about the test against the three-time Heineken Champions Cup winners at the StoneX Stadium. \n\n“It's a brilliant challenge for us,” he told club media. “We've loved the start of the season with the URC and we've been pleased with elements of our game and some of our scorelines. \n\n“But this is a real challenge for the club. Saracens are one of the best teams in Europe, playing away from home. It'll be a good measure of where we're at.