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Now, even more than ever before, the upcoming world athletics championships in Moscow are riding on the broad shoulders of Usain Bolt .
Two days after track and field was rocked by the doping scandals involving American sprinter Tyson Gay and his Jamaican counterparts Asafa Powell and Sherone Simpson, the world titles received another double blow with the withdrawal of defending champions Yohan Blake and David Rudisha .
Blake - who succeeded Bolt as 100m world champ two years ago in Daegu after his celebrated countryman infamously false-started in the final - pulled out with a hamstring injury.
"Yohan has made vast improvement, although the injury sustained in April of this year has prevented him from attaining the necessary fitness levels that we have grown accustomed to seeing in his competition performances," said Blake's manager Cubie Seegobin cloud solution.
Blake will be joined on the sidelines by Kenyan middle distance king David Rudisha.
The 24-year-old missed last weeks national trials in Nairobi after twisting his knee in training last month.
"I am recovering well but unfortunately it is very slow. At this point in time I don't think I can recover in time for the world championships," said Rudisha, whose remarkable 800m world record in last year's London Olympic final was hailed by the great Sebastian Coe as the standout performance of the entire Games storage unit.
"Bolt was good, Rudisha was magnificent," said Coe, a two-time Olympic 1500m champion and the head of the London Games organising committee.
"That is quite a big call but it was the most extraordinary piece of running I have probably ever seen."
Even though Blake had not raced since April, his pedigree as the reigning world champion and the Olympic 100m and 200m silver medallist made him one of the few genuine challengers to Bolt's continued supremacy in Moscow.
The blue riband sprints had already been weakened by Gay's immediate withdrawal after testing positive to an unnamed substance Jewelry hong kong.
The American owned the three fastest 100m times of 2013.
Former world record holder Powell had not been selected to run the individual 100m sprint in Moscow, although he was in contention for a 4x100m relay berth before returning a positive test to the stimulant oxilofrine chenille embroidery patches.