TORONTO (AP) — Ashleigh Barty lost 6-7 (5), 6-3, 6-4 to American Sofia Kenin in second-round play at the Rogers Cup on Tuesday, putting the Australian’s No. 1 ranking in peril.
Current world No. 2 Naomi Osaka of Japan would overtake Barty for the top ranking by winning her first match on Wednesday. The 21-year-old opens her Rogers Cup against Germany’s Tatjana Maria.
Americans Sloane Stephens, the No. 7 seed, and Venus Williams also were eliminated.
Stephens fell to Marie Bouzkova of the Czech Republic 6-2, 7-5. The 39-year-old Williams, a seven-time Grand Slam champion, lost 6-4, 6-2 to Spain’s Carla Suarez Navarro. Suarez Navarro, ranked 26th in the world, snapped a five-match losing streak against the 56th-ranked Williams.
Donna Vekic, Alison Riske, Katerina Siniakova, Zhang Shuai, Iga Swiatek and Ekaterina Alexandrova also advanced to the second round with wins Tuesday.