By Ian Gordon, PA Sport

Dwain Chambers is determined to finally fulfil his dream of winning a major medal at a top championships in Paris this month.

The 25-year-old Londoner grabbed a brilliant bronze when he made his debut in the individual 100metres at the 1999 world championships in Seville.

But two years ago in Edmonton, Chambers had to settle for fifth despite breaking 10 seconds in the final as American Maurice Greene claimed his third successive title.

Chambers had also just missed out at the 2000 Olympics in Sydney, finishing fourth when Greene again triumphed.

But with Greene seemingly in decline and fellow American Tim Montgomery unable to match his feats of last year when he captured his countryman's world record with a time of 9.78secs at the Grand Prix Final in Paris, Chambers can see his chance.

Chambers finished second that record breaking day - equalling Linford Christie's European mark of 9.87secs - but is determined to go one better when he returns to the French capital later this month.

"I have not moved on as much as I would have wanted since winning bronze in Seville," added Chambers, who has so far fended off rival Mark Lewis-Francis's bid to become British number one.

"But I feel as though I am coming into form at the right time and I am focussed on Paris. The event is very open this year."

Chambers has had mixed fortunes on the track this summer with a few defeats to his British and world rivals on the grand prix circuit.

But Chambers again proved set-backs only act as a spur with a dominant victory at the trials in Birmingham last month with Lewis-Francis back in third behind Olympic 200m silver medallist Darren Campbell.

It was a similar story last year when Chambers recovered from his Commonwealth Games nightmare in Manchester to race to the European title in Munich just a week or so later.

"I've taken a few blows, but you have to do that if you want to come back with the knock-out punch," added Chambers. "That's what I will be looking to do at the worlds."

Chambers has split from his long-term coach Mike McFarlane this year after opting to spend more time in the United States.

The Belgrave Harrier is currently training under the guidance of 70-year-old Ukrainian Remi Korchemny, who has advised some of the world's top sprinters, including former Olympic champion Valeriy Borzov in a career spanning 40 decades.

Chambers will be hoping Korchemny will provide that vital extra ingredient he might still need to beat the likes of Montgomery and Greene even if they are not on the top of their form in Paris.