Canada's Leylah Fernandez was upset 6-4, 7-6 (1) by Turkey's Zeynep Sonmez in first-round action Friday at the Nottingham Open.
Fernandez, seeded second at the WTA 205 grass-court event, had seven aces, but she hit into four double-faults and was broken three times.
Sonmez evened her career record against Fernandez at 1-1.
Fernandez came out on top earlier this year when she beat Sonmez in three sets at the clay-court Stuttgart Open.
The 23-year-old Fernandez, from Laval, Que., saw her season record drop to 11-17.
The world No. 22 has lost her first match in four of her last five events.
