TOKYO, Sept. 16 (Xinhua) -- Canada's Ethan Katzberg retained his hammer throw world title with an event record of 84.70 meters, while Kenya's Faith Kipyegon extended her dominance in middle-distance running by winning her fourth 1,500m world title at the World Athletics Championships here on Tuesday.
Katzberg, 23, delivered his best throw on the second round, beating the previous championships record of 83.63m set by Ivan Tikhon of Belarus back in 2007. He also achieved two over-83m marks en route to wrapping up his victory.
