Australia’s Ash Barty has lost to Russian wildcard Svetlana Kuznetsova. The former US and French Open champion winning the match 6-2, 6-4.
Kuznetsova was down 2-0 and stormed back to win six straight games to claim the first set.
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If Barty reached the final she would have returned to no. 1. As it is Naomi Osaka will hold onto the top spot.
Barty had a poor serving performance, serving at just 51% compared with 73% from her opponent.