Kazakhstan's Elena Rybakina has secured the year-end world No. 1 ranking in women's tennis, capping a dominant season. Meanwhile, former champion Naomi Osaka suffered a surprising early exit in Tokyo, falling to a lower-ranked opponent in the opening round.
The 25-year-old Rybakina's ascent to the top spot was confirmed after her latest results, making her the first player from Kazakhstan to finish a year as the world's top-ranked singles player. Osaka, a four-time Grand Slam winner, was stunned in her return to the Japanese capital, raising questions about her form ahead of the next major tournaments.
