Alexandrova has been called up to substitute for Keys following Mirra Andreeva, currently ranked as the ninth-ranked player, chose not to sign in due to lacking fitness to play in today's matches, according to the Women's Tennis Association.
Recent coverage have highlighted issues about how competitors are being let down by the tournament organizers.
Greetings to the latest installment at the Women's Tennis Finals. While both matches offer thrilling action, the primary attraction showcases Swiatek competing against Amanda Anisimova.
Their last meeting at the Wimbledon Championships four months ago was remarkably one-sided, with the Polish star achieving a decisive 6-0, 6-0 win. However, the American player delivered a remarkable recovery just weeks later, overcoming Swiatek in straight sets during the US Open quarter-finals.
This crucial encounter represents the final installment of their ongoing battle, with the victorious player advancing to the next round in Riyadh.
Before that contest, Elena Rybakina will face Alexandrova replacing Madison Keys. The American player pulled out due to health issues in what represents a dead rubber, paving the way for the tenth-ranked player to participate. Rybakina aims to maintain her perfect streak, having previously defeated both Swiatek and the American contender to claim her last-four position.