Dwain Chambers champ in 100

BIRMINGHAM, England -- Dwain Chambers kept alive his hopes of making the London Olympics by winning the 100 meters at the British trials Saturday.

Chambers has struggled since the British Olympic Association was forced to lift its ban on doping offenders, but he ran his fastest time yet -- 10.25 seconds -- in winning his sixth national title.

The top two finishers automatically qualify for London, but unlike second-place Adam Gemili and third-place James Dasaolu, Chambers has yet to post the British qualifying time of 10.18. The former world indoor and European champion has until July 1.

Meanwhile, 400 hurdles world champ Dai Greene won his final to make his first Olympic team. He struggled early in the season because of illness and recovery from knee surgery in December.