Chambers insists he will be fully-focused on qualifying for Beijing and has put to the back of his mind the High Court challenge he is making next Wednesday against a British Olympic Association by-law banning the reformed drugs cheats from the team.

Just as he did at February's World Indoor trials in Sheffield, when he thrashed most of the country's best young sprinters, the 30-year-old Londoner plans to make his top-level experience count to the full.

Before their clash in the Sheffield final, 21-year-old Craig Pickering was being talked about as a possible world indoor champion, but found himself left in his blocks when Chambers powered away for the easiest of victories.

"This is what it's all about," said Chambers, himself battle- hardened after learning his trade from some of the world's greatest sprinters.

Chambers insisted: "What he went through, having to deal with the likes of myself, is what I had to go through with Maurice Greene and other athletes. It's a new ball game for him and he'll learn a lot from that."