Olympic 400m champion Christine Ohuruogu finished sixth behind winner and arch rival Sanya Richards at the Bislett Games in Oslo.

In only her second 400m of the season, Ohuruogu clocked 51.19 seconds, while American Richards finished in 49.23, the best time in the world this year.
Usain Bolt withdrew from the 100m because of scheduling problems.
In the absence of the Olympic champion and world record holder, fellow Jamaican Asafa Powell won in 10.07.
Simeon Williamson of Great Britain finished fourth behind Powell in the 100m 'A' final in a time of 10.13.
Richards' time in the women's 400m also tied the Bislett Stadium record, set by Czech Tatjana Kocembova in 1983.
Shericka Williams, the Olympic silver medallist from Jamaica, finished second in 49.98.
Defending world champion Ohuruogu, who pulled out of a race in Italy last week with a sore throat, runs in the UK trials in Birmingham next week.
Richards, who took Olympic bronze behind Ohuruogu in Beijing, also won the opening event of the six Golden League meetings in Berlin a fortnight ago.
Londoner Leevan Yearwood, backed by a very strong following wind, won the 100m 'B' race, sharing a time of 10.10 with American Mark Jelks.
And Sheffield's Richard Strachan won the 400m 'B' race in 45.86, with South Africa's Paralympic gold medallist Oscar Pistorius following him home in a season's best 47.18.