By Ayumba Ayodi

World 800m champion Eunice Sum and 3,000m steeplechaser Jairus Birech will be hoping to consolidate their 2014 IAAF Diamond League Series leads with victories in Lausanne on Thursday.

Sum won her season opener in Doha on May 9 in a world-leading time of 1:59.33 before pulling away in the final straight to claim victory in 1:59.49 at Rome on June 5. She will be aiming for her third victory in this year’s series. Read more….

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