10,000m: Tirunesh Dibaba v Ejegayehu Dibaba

They are to athletics what the Williams sisters have been to tennis, though, both came away from Athens with just minor medals.

Tirunesh is the one most likely to be topping the podium this time as she arrives with the tag world champion in the event.

Ejegayehu is the elder of the two at 26 to Tirunesh's 23 and whilst she is oozing in talent - she took two bronzes in the 2005 World Championships - she may still find that her younger sibling is just that bit too good for her.

Jennifer Stuczyniski and Yelena Isinbayeva. [Agencies]

Pole vault: Yelena Isinbayeva v Jennifer Stuczyniski

Should be no deal on this one with Isinbayeva seemingly able to set new world records as if turning on the tap. The Russian will be highly motivated to put the American in her place after Stuczyniski said she was going to "kick the Russian's butt in Beijing".