Chambers wins heat to reach 60 metre semifinal at world indoors

DOHA, Qatar - Britain's Dwain Chambers ran the fastest qualifying time in the 60 metres at the World Indoor Championships Friday.

The European indoor champion breezed into Saturday's semifinal in 6.59 seconds, showing that his comeback from a two-year doping ban continues to pick up speed.

Chambers said he still has work to do before claiming his first global gold. He won the silver at the world indoors two years ago in Valencia, Spain.

American Trell Kimmons ran the second-fastest qualifying time of 6.61 seconds. He was a late replacement for Ivory Williams, who was dropped from the team after testing positive for marijuana.

Dyan Armstrong of Kamloops, B.C., advanced to the shot put final, finishing second in his qualifying group with a throw of 20.5 metres.