Botero was the one man capable of pushing Lance Armstrong in last year's race when he surprisingly beat him in the first main time trial of the race.

BBC: Telekom

He also took bronze in the pool last week in the men's 1, 500-meter freestyle race.

CNN: August 10, 2012 -- Updated 2336 GMT (0736 HKT)

But when Renault sacked Nelson Piquet Jr in July following a string of poor performances, the Brazilian's revelation that he deliberately crashed in Singapore last year to help team-mate Fernando Alonso win the race revived the sense that F1 has serious problems to address.

BBC: F1 returns to scene of the crime