The eyes of the athletics world will be fixed on David Rudisha this weekend, as the 800m world record-holder makes his eagerly awaited return to action.
Rudisha, who missed most of 2013 with a knee injury, will make his comeback in Sunday's Diamond League meet in Eugene, USA.
The Olympic champion has been the star of the sport in the last few years, no more so than when he powered to that victory in London, smashing the world record in the process.
In his absence, Ethiopia's Mohammed Aman has stepped up to the mantle. The 20-year-old won World Championship gold in Moscow last year, and is also the only man to have beaten Rudisha since 2010.
Aman will also be running in the event, known as the Prefontaine Classic, this weekend, but will not be Rudisha's only challenger.
Nigel Amos of Botswana was the closest to Rudisha's 1:40.91 that evening in London, and at only 20 years of age, is also one of the events rising stars, and a serious threat to the Kenyan.
Other high-class athletes in the race include Sudan's Abukaker Kaki - who has more (5) wins over Rudisha than anyone else, and Duane Solomon - an unlucky fourth in London two years ago, but undefeated in seven races this year.
Everyone will be watching Rudisha, though. Can the greatest 800m runner of all time get back to his best? Sure, it will probably take some time, but in an event which is already at it's highest ever level, it will be worth the wait.
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