Usain Bolt has admitted he found the recent controversies about doping in the sport depressing - but has resisted the idea that he has sole responsibility for rescuing its reputation by winning clean in the Chinese capital against a field including the doubly sanctioned Justin Gatlin.

As we, the summoned and assembled media, awaited the start of Usain Bolt’s press conference in a very large room inside the Nuo Hotel - a start which was by now delayed more than half an hour - it became apparent that the reggae which had been thumping and bumping away in the foreground during that time was on a loop.

Bob Marley’s One Love did its thing once again. Meanwhile the long black leather sofa in front of us remained untenanted, flanked by dotted red and green spotlights trained on the crystalline ceiling.

If Justin Gatlin wins the 100 metres and/or the 200m in the forthcoming World Athletics Championships in Beijing then the International Association of Athletics Federations (IAAF) - and their venerable outgoing President Lamine Diack - should hang their heads in shame.

Shortly after Chris Froome had completed his second Tour de France triumph the Sky team boss Sir Dave Brailsford declared: “This is a clean rider. We are a clean team. You can have 100 per cent faith in what we do.”

Britain’s double Olympic champion Mo Farah has been questioned by the United States Anti-Doping Agency (USADA) as part of an investigation into doping allegations surrounding his coach Alberto Salazar.

At times it’s been like watching London 2012 all over again. Well almost.

British Athletics claim the large queues at the Sainsbury’s Anniversary Games ticket office last night, which led to a number of frustrated fans heading home out of pocket, was caused by “a substantial increase in walk-up purchasers”.

Usain Bolt hit back at his doubters on a wet evening here at the Sainsbury’s Anniversary Games, winning the men’s 100 metres final with a season-best equalling time of 9.87sec. 

Usain Bolt, whose stop-start season starts again tomorrow when he runs the 100 metres at the Olympic Stadium in London in the Sainsbury’s Anniversary Games, has insisted he will defend his world title in Beijing next month – and added that he intends to do so successfully.

No world records were set at the IAAF Diamond League meeting in Lausanne on Thursday night, which was held in an old stadium marked out for destruction. And yet people still managed to enjoy themselves hugely. How was this possible?

Usain Bolt has responded to a change in the British tax laws by committing himself to run in the Sainsbury’s Anniversary Games when London’s Olympic Stadium re-opens on July 24.

Despite the absence through injury of Usain Bolt in tonight’s International Association of Athletics Federations’ Paris Diamond League meeting, Jamaican sprinters dominated the men’s and women’s 100 metres, with Asafa Powell and Shelly-Ann Fraser-Pryce winning in 9.81sec and 10.74 respectively.

Zharnel Hughes, the 19-year-old sprinter who gave his training partner Usain Bolt a run for his money over 200 metres  in New York City earlier this month, says he is targeting next year's Olympic Games in Rio de Janeiro after being ruled eligible to compete for Britain.

Usain Bolt, running at the Icahn Stadium at Randall’s Island where he set his first 100 metres world record in 2008, produced what he described as "one of the worst races I've run,” as he earned a narrow victory in the 200m at the International Association of Athletic Federations’ Diamond League meeting in New York City.

If the message coming from European Olympic Committees (EOC) President Patrick Hickey concerning Armenia’s controversial participation in the inaugural European Games was that they were thrilled to have the country competing despite political tension with hosts Azerbaijan, the message coming from the crowd at the Opening Ceremony was the polar opposite.