London 2012 Olympics: Dwain Chambers faces UK crowd for first time since lifetime bans were dropped Chambers, 34, has received a warm reception from fans during his appearances at UK Championships in recent years but the Powerade Great CityGames, staged on a temporary track in central Manchester, will provide a very different barometer of opinion. The "street athletics" event, which is in its fourth year, tends to attract members of the general public rather than die-hard athletics fans and their reaction to Chambers could set the tone for how he will be received at this summer's Olympics. Whether he can win them over with a victory will depend on the quality of his staying power since he will be racing out of his comfort zone over the rarely run distance of 150 metres. He is also up against a highly competitive field in the shape of Wallace Spearmon, the 2007 world silver medallist, European 100m record-holder Francis Obikwelu, of Portugal, and GB team-mate Marlon Devonish, who set a UK 150m record of 14.88sec. Chambers, who opened his outdoor account with a disappointing sixth place in a 100m race in Puerto Rico last week, will be hoping to shake away the cobwebs before he heads to Ostrava, in the Czech Republic, for next Friday's clash with triple Olympic champion Usain Bolt. "It's always a great honour to compete in front of the British public," he said. I'm not familiar with the distance so it will be a completely new experience but I'm I good shape mentally and physically and hope to perform well against world-class sprinters. World heptathlon silver medallist Jessica Ennis will also be looking for a quick time in a 100m hurdles race that pits her against two talented Americans: Olympic champion Dawn Harper and world silver medallist Danielle Carruthers. It will be Ennis's final competitive outing before next week's heptathlon in Gotzis, Austria, where she will be competing against most of her main London rivals in an important Olympics dress rehearsal. Another of Britain's big golden hopes for London, triple jumper Phillips Idowu, opens his season at Saturday's Diamond League meeting in Shanghai in what will be his first head-to-head with rival Christian Taylor since the American deprived him of the gold medal at last summer's World Championships in Daegu.