Naomi Osaka's US Open title defence is over as she fell in the third round to a stunning performance by Canadian teenager Leylah Fernandez.
The 18-year-old Fernandez capitalised as Osaka lost her cool to craft a remarkable 5-7 7-6 (7-2) 6-4 victory.
Osaka was broken as she served for the match in the second set, and a poor tie-break handed Fernandez the initiative under the New York lights.
The teenager could not contain her smile as she secured a fantastic win.
Osaka never regained her composure after she was broken in the second set, twice throwing her racquet to the floor as the tie-break flew away from her.