Brussels  - American Sanya Richards on Friday ensured at least a share of the one-million-dollar jackpot on offer at the Golden League series.

Richards won the women's 400m race - as she has in all five previous Golden League meets this season - and thus was the first athlete to be assured at least a share of the jackpot.

Richards, who also won the gold at the world championships last month, took first place in a world-best time this year of 48.83 seconds, beating Britain's Christine Ohuruogu into second place by more than a second.

Ohuruogu finished in 50.43. Jamaican Shericka Williams was third.

Later Friday Russian pole vaulter Jelena Isinbayeva and Ethiopian 5,000m runner Kenenisa Bekele could also take a share of the jackpot if they win their events in Brussels. dpa