After parting company with coach Thomas Högstedt towards the end of 2017, Bouchard began working with Harold Solomon. She teamed up with Vasek Pospisil to compete at the Hopman Cup for Canada, but failed to win a single match in the competition, losing all three of her singles games in straight sets, and picking up a buttock injury during her last match against Elise Mertens. Bouchard's losing streak continued at the Hobart International when she was beaten again in straight sets by Aryna Sabalenka, a result that meant Bouchard fell out of top 100 of WTA rankings for the first time since 2013.