Kazakhstan's Elena Rybakina secured the last qualifying spot for the season-ending WTA Finals in Riyadh after advancing to the Pan Pacific Open semi-finals in Tokyo on Friday. Rybakina, who has won two WTA 500 titles this season, beat Canada's Victoria Mboko 6-3 7-6(4) in the Tokyo quarters. The 26-year-old will be making her third consecutive appearance at the Riyadh showpiece, which runs from November 1-8. Russians Mirra Andreeva, 18, and Ekaterina Alexandrova, 30, were named as the first and