Alexandrova has been called up to replace Keys after Mirra Andreeva, currently ranked as the ninth-ranked player, decided against participating due to lacking fitness to play today, according to the Women's Tennis Association.
Current reports have highlighted concerns about how players are being let down by the WTA.
Welcome to another day at the WTA Finals. Although both matches offer thrilling action, the primary attraction showcases Iga Swiatek competing against Anisimova.
Their previous encounter at the Wimbledon Championships earlier this season proved extremely lopsided, with Swiatek securing a commanding 6-0, 6-0 win. However, Anisimova delivered a remarkable recovery just weeks later, overcoming her opponent in straight sets during the New York tournament.
This crucial encounter marks the final installment of their ongoing battle, with the victorious player progressing to the semi-finals in the Saudi Arabian capital.
Earlier in the day, Rybakina will face Alexandrova replacing the originally scheduled opponent. Keys pulled out due to illness in what represents a meaningless match, paving the way for the world No 10 to step in. Rybakina aims to maintain her perfect record, having already beaten both her Polish rival and the American contender to secure her semi-final position.
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