Ohuruogu off the pace in Lausanne
Christine Ohuruogu was unable to collect back-to-back 400m victories in the Diamond League as the former Olympic champion finished fourth in the meeting in Lausanne.
The 29-year-old triumphed last Sunday in Birmingham, but on Thursday in Switzerland Ohuruogu posted a time of 51.03 seconds, trailing leader Francena McCorory, who ran a time of 50.36secs, second-placed Amantle Montsho and third-placed Novlene Williams-Mills.
And after the race Ohuruogu said: "It wasn't a good race and was a bit scrappy. I didn't have enough commitment going into the back straight. I expected a bit more from myself. I don't have an excuse really."
Shara Proctor came third in the long jump despite posting a season's best of 6.92m, while Tiffany Porter ran her season's best of 12.65secs in the 100m hurdles but was only able to finish fifth.
Tyson Gay meanwhile won the 100m in a time of 9.79secs, beating Asafa Powell who finished second on 9.88secs.
American Gay had targeted breaking his personal record of 9.69secs which he set in 2009, but despite edging Powell the 30-year-old was unable to do so in Lausanne.