Sore Sun's countdown conundrum

Pool great dominates at nationals, but admits Tokyo Games in doubt

QINGDAO, Shandong - Sun Yang cemented his status as China's top freestyler at the Chinese National Swimming Championships over the last week - but the triple Olympic champion admitted the physical toll of the sport has left him doubting his participation in the 2020 Tokyo Games.

After almost eight months away from competition following his Rio Games exertions, the 25 year-old won golds in all his events - the 100, 200, 400, 800 and 1,500m freestyle - over eights days in Qingdao, posting world-leading times in the 200 and 400.