Belarus' Marina Arzamasova celebrates after winning the gold medal in the women's 800m final ahead of Kenya's Eunice Jepkoech Sum, bronze, left, at the World Athletics Championships at the Bird's Nest stadium in Beijing, Saturday, Aug. 29, 2015 (AP)
Marina Arzamasova of Belarus stunned defending champion Eunice Sum to win the women's 800 metres world title in a thriller on Saturday.
The European champion blew past Sum with 200 metres to run and held on in a tight finish to win in one minute, 58.03 seconds and pip fast-finishing Canadian Melissa Bishop at the line.
Sum, who has dominated the event since winning gold in Moscow two years ago, settled for bronze in 1:58.18.
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