What the sources add
World number one Elena Rybakina withdraws from the season-ending WTA Finals because of a viral illness.
Rybakina pulled out on the eve of the Indian Wells tournament, with Ukraine's Marta Kostyuk replacing the top seed.
BBC Sport World number one Elena Rybakina withdraws from the season-ending WTA Finals because of a viral illness.
BBC Sport World number one Elena Rybakina withdraws from the season-ending WTA Finals because of a viral illness.
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