Kristina Mladenovic wins over Kerber in Us open 2019

 NEW YORK, NY, USA -- 
Former Top 10 player Kristina Mladenovic of France notched a big win in the first round of the US Open on Monday, upsetting 2016 champion and No.14 seed Angelique Kerber of Germany, 7-5, 0-6, 6-4.