BEIJING - Marina Arzamasova of Belarus stunned defending champion Eunice Sum to win the women's 800 metres world title in a thriller on Saturday.
Belarus's Marina Arzamasova catches her national flag to celebrate winning the 800 metres at the World Championships in Beijing on August 29, 2015
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.