Dwain Chambers achieved the first stage in his bid to run at the Beijing Olympics when he won the 100 meters final at the British trials on Saturday and must now await a legal ruling on his eligibility. Chambers, who completed a two-year doping ban in 2006 following a positive test for the designer steroid THG, won impressively in 10.00 seconds, with Simeon Williamson second in a personal-best 10.03 at the Birmingham trials. In normal circumstances, the first two automatically qualify for Beijing if they have the Olympic qualifying time - which both have achieved. However, a British Olympic Association (BOA) bylaw prevents any athlete guilty of a doping offence from being selected for next month's Games. Chambers is challenging the bylaw in the High Court and will find out on Wednesday if his lawyers have secured a temporary injunction that would make him eligible for the Olympics. “I've done my part of it and, hopefully, next week things will go well,” Chambers told the BBC. “My biggest fear was messing up, I just had to keep cool. I'm so happy.” Chambers claims the lifetime ban, which applies to all sports, is an “unreasonable restraint of trade” but the BOA has pledged to fight for the right to continue to keep drugs cheats from wearing the British vest at any Olympics. The 30-year-old former world championship bronze medallist now faces an anxious wait to see if the decision, which could open the door for several banned athletes from other sports, goes his way. Chambers had been slow out of the blocks in the semifinal earlier on Saturday before coming through to win in 10.21. He learned from that experience in the final and started powerfully, though 22-year-old Williamson had the edge over the opening 40 metres. Chambers maintained his composure, though, and surged through to win the race in a stadium record time. Williamson finished well enough to ensure he is the only man guaranteed a place in Beijing, while third-placed Craig Pickering will hope his 10.19 performance will impress the selectors enough to secure one of the two remaining slots. US sweeps relays The United States swept the men's and women's 100-meter relay titles at the World Junior Championships in Poland on Saturday. Dante Sales, Antonio Sales, Marquise Goodwin and Terrell Wilks captured the gold in the men's field in a time of 38.98 seconds. Jamaica, which won the event at the last junior worlds two years ago in Beijing, took silver, and South Africa came third. In the women's relay, Jeneba Tarmoh, Shayla Mahan, Gabrielle Glenn and Tiffany Townsend successfully defended the American women's gold medal in a time of 43.66 seconds. Jamaica was second (43.98) and Brazil was third (44.61). Earlier, Teona Rodgers of the United States won the women's 100-meter hurdles title. The 19-year-old Rodgers led the field in 13.40 seconds, heading off Shermaine Williams of Jamaica (13.48) and Belkis Milanes of Cuba (13.49). In the women's long jump, Ivana Spanovic of Serbia won with a leap of 6.61 meters. Nastassia Mironchyk of Belarus took silver, and Dailenys Alcantara of Cuba the bronze. Raphael Holzdeppe of Germany won the men's pole vault title, clearing 5.50 meters. Pawel Wojciechowski of Poland finished second with a personal best of 5.40 meters, while Karsten Dilla of Germany was third after clearing 5.30 meters. There are athletes from 183 countries taking part at the junior worlds.