Elena Rybakina, holding the top ranking globally, has pulled out of the upcoming WTA Finals competition. Tournament organizers confirmed her withdrawal from the season-concluding event was prompted by a viral illness.
Further updates regarding her recovery status and the tournament lineup are anticipated as the situation continues to unfold.
Earlier reports and follow-ups on the same developing story.
Ultrarunner Stephanie Case speaks to BBC Sport about becoming the first women to run 100 miles in Antarctica, saying that she wanted to prove to every mother in the world that 'motherhood is not the finish line' and that they can 'go out and do big adventures and dream big.'
All you need to know as Ciryl Gane defends his heavyweight title against Josh Hokit and Kayla Harrison puts her women's bantamweight belt on the line against Amanda Nunes.
Former Arsenal manager Arsene Wenger is considering standing against Gianni Infantino as a candidate in Fifa's presidential election in March.
Former Australia captain Michael Clarke says fans of the national side "can't trust what's real" and has called for the investigation into the 2018 Australia ball-tampering scandal to be reopened.
From bitter rivalries and controversial decisions to dramatic knockouts, we look back at five unforgettable all-British boxing contests and ask you to vote for the greatest.