Russian tennis star was 6-7 (4/7), 5-5 down against Germany's Siegemund when umpire stopped match
32-year-old has slipped down the rankings to 147, outside automatic qualification
Russian was only able to play in eight events in 2019, contesting just 15 matches in total
Injury-dogged tennis star says she wants to get healthy for next year’s complete season
American has a 19-2 record against the Russian
Russian has won two of her five career majors at the venue
Barty, ranked 18, saved two match points in the final game against the 2011, 2012 and 2015 winner
Russian's French opponent French is in the form of her life, winning the Wuhan Open last weekend
Russian reveals why American always dominates her
Russian star content by her overall showing though