Sleepless Efimova enjoys dream swim, Campbell impresses

Yuliya Efimova of Russia set a world record in the 50 metres breaststroke and Australia's Cate Campbell left her rivals for 50 freestyle gold trailing in qualifying at the world championships in......

Efimova sets world record in 50 breaststroke

Russia's Yuliya Efimova followed up Friday's world championship gold medal in the women's 200 metres breaststroke by setting a world record in the 50 metres version of the event in her heat on......

Another Russian athlete tests positive

Efimova faces life ban after positive test IMAGE: Russia's Yuliya Efimova looks on. Photograph: Matthias Hangst/Getty Images. Russia's Yulia Efimova faces a life ban after the breaststroke......

World Swimming: Sjostrom sets 100m butterfly world record

Sarah Sjostrom of Sweden celebrates after setting a new world record in women's 100m butterfly final at the Aquatics World Championships in Kazan. Photograph: Michael Dalder/Reuters Sweden's Sarah......

World C'ships: US teen Ledecky betters own 1500m freestyle world mark

Katie Ledecky from US celebrates after setting a new World Record in the women's 1500m freestyle heats at the Aquatics World Championships in Kazan, Russia on August 3. Photograph: Stefan......