Elena Rybakina advanced to the National Bank Open semifinals after Marta Kostyuk was forced to retire with an apparent arm injury Monday with Rybakina leading 6-1, 2-1.

Victoria Mboko keeps on rising. Two days after dispatching No. 1 seed Coco Gauff, the Canadian teenage sensation booked her place in the National Bank Open semifinals with a 6-4, 6-2 win over Spain’s ...