She recorded her first big result on the junior circuit when she reached the final of the Grade 1 USTA International Spring Championships at 14 years old .
Vickery reached a career - high ITF junior ranking of No. 6 in the world in September 2012 .
Vickery recorded Vickery 's first big result on the junior circuit when she reached the final of the Grade 1 USTA International Spring Championships at 14 years old .
Vickery reached a career - high ITF junior ranking of No. 6 in the world in September 2012 .