Defending champion Elena Rybakina has withdrawal from the 2026 WTA Finals on the eve of the season-ending tournament citing a medical issue.
Source: [Sky Sports](https://www.skysports.com/tennis/news/12040/13609520/elena-rybakina-pulls-out-of-2026-wta-finals-at-indian-wells-due-to-medical-issue-and-is-replaced-by-marta-kostyuk)