Pakistan, Aug. 10 -- World number one Aryna Sabalenka was eliminated by Russian 16th seed Ekaterina Alexandrova on Saturday in a fourth-round match at the WTA Toronto Masters tournament.

Alexandrova defeated the four-time Grand Slam winner from Belarus 7-6 (7/3), 4-6, 6-4 in 2hr 29min to book a berth in the quarter-finals.

Sabalenka, who will seek her third consecutive US Open title next month, fell to 5-5 in her career WTA rivalry with Alexandrova, who will face either American eighth seed Amanda Anisimova or Ukraine's ninth-seeded Elina Svitolina in the quarter-finals.

Sabalenka broke for a 2-0 lead in the opening set, dropped the next four games, then held and broke back to 4-4 on a forehand drop volley winner.

Double faults by Sab...