Ekaterina Alexandrova has stepped in to substitute for Keys after Andreeva, who holds world No 9, decided against participating because of lacking fitness to play in today's matches, as stated by the Women's Tennis Association.
Recent coverage have emphasized concerns about how competitors are being let down by the tournament organizers.
Welcome to the latest installment at the WTA Finals. While all contests promise excitement, the main event features Iga Swiatek competing against Amanda Anisimova.
Their previous encounter at Wimbledon earlier this season was remarkably one-sided, with the Polish star securing a decisive double bagel victory. Nevertheless, Anisimova made an impressive recovery shortly after, defeating Swiatek in straight sets during the US Open quarter-finals.
Today's match represents the final installment of their competitive rivalry, with the winner progressing to the next round in Riyadh.
Earlier in the day, Elena Rybakina will face Alexandrova instead of the originally scheduled opponent. Keys pulled out due to health issues in what represents a dead rubber, paving the way for the tenth-ranked player to participate. The Kazakh star aims to maintain her perfect streak, having already beaten both Swiatek and Anisimova to claim her semi-final spot.
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