Canadian teenager Leylah Fernandez continued her remarkable US Open run as she beat 2016 champion Angelique Kerber to advance to the quarter-finals. On the eve of her 19th birthday, Fernandez backed up her win over Naomi Osaka with a 4-6 7-6 (7-5) 6-2 victory over Germany's Kerber. She battled back from a 4-2 deficit in the second set to force a tie-break and barely let up from then on. Fernandez will face fifth seed Elina Svitolina for a semi-final spot. Fernandez doubled over as her