With a display of stunning elegance and control, Russia’s Evgeniya Kanaeva retained her Olympic rhythmic gymnastics title on Saturday to confirm her status as the sport’s outstanding performer. The three-time world champion scored a total of 116.900 points to finish 2.400 points above compatriot Daria Dmitrieva at Wembley Arena in west London, while Liubou Charkashnya of Belarus took the bronze medal.