Chambers beat Lewis-Francis for the first time this season

The European champion made a strong start and powered away from Montgomery and fellow Briton Mark Lewis-Francis, who beat him in Oslo on Friday.

His winning time of 10.15secs was not particularly quick, but from lane seven, and against a strong head wind, it was still a new stadium record at Scotstoun.

"I think someone put me out there deliberately but I am grateful for the lane and grateful for the win," Chambers said.

"I am slowly gaining in confidence and I am looking forward to the World Championships now. I know these guys are going to be my main rivals."

Montgomery and Lewis-Francis both felt Chambers had got a 'flyer', but reaction times confirmed the European champion's reaction time was legitimate.

The American pipped Lewis-Francis for second on the line, clocking 10.26 with the young Briton coming home in 10.28.

I am happy to have duffed up the Americans! Chris Rawlinson Steve Cram's view

"I have had a good season so far and I only came back from Ostrava yesterday, so I am knackered," Lewis-Francis said.

"It is good to see Dwain running well again but this year is all about the World Championships."

Chris Rawlinson also served notice of his medal potential in Paris with another dominant performance in the men's 400m hurdles.

After victory in the European Cup last weekend, Rawlinson clocked a superb 48.43secs - another new stadium record - in the blustery conditions.

With top American Eric Thomas falling at the first hurdle, Britain's Matt Elias took third in a season's best of 49.62.

"I am happy with the time," Rawlinson said. "I think Matt (Elias) really helped me because he had a storming first 300m.

"But that was another consistent run and I am happy to have duffed up the Americans!"

Jade Johnson leapt 6.77m to finish third in the women's long jump

John Mayock gave Great Britain their first victory of the day by winning the men's 1500m, pipping compatriot Anthony Whiteman in the home straight.

Mayock, competing in his 45th international for GB, clocked 3.37:92 ahead of American Jason Lunn, with Whiteman in third.

"I am so pleased - I just wanted to win so much," said Mayock, who confirmed he wants to run the distance at the World Championships.

"I have been training so hard and everyone told me I was running really well."

Daniel Caines enjoyed an encouraging return with second place in the men's 400m after suffering from 'flu.

"I have had a weird week so I am pleased with that," he said, after clocking 45.44secs behind American Derrick Brew, who won in 45.31.

"This shows I am back on the right direction and my body is getting stronger again."

Scotland's Ian Mackie ran a personal best 46.13 in third, having moved up from the shorter sprints, but Iwan Thomas was "very disappointed" with fourth.

Glasgow round-up

"Two races in three days is too much really," Thomas said, having run in Oslo on Friday.

Neither Darren Campbell and Christian Malcolm could make any impression on American Bernard Williams in the 200m.

The pair later joined Chambers and Lewis-Francis for the men's 4x100m relay, but a poor changeover between Chambers and Campbell left Lewis-Francis too much to make up on the USA in the final leg.