Americans David Oliver and Allyson Felix were the class acts on the second day of the London Grand Prix as British athletes once again struggled.
Oliver, the dominant sprint hurdler of the year, barrelled to a decisive victory in the 110m hurdles with a meeting record of 13.06 secs.
And Felix, winner over 200m on Friday night, added the 400m to her list of honours with a hard-fought win over Tatyana Firova and Debbie Dunn.
The home nation's medal-winning heroes from the European Championships again failed to translate their Spanish form to the colder conditions of south London and tough standards of the Diamond League.
The high points were personal bests for Eilidh Child in the 400m hurdles (by 0.01 seconds) and double bronze medallist Perri Shakes-Drayton in the 400m.
The muscular Oliver, who came within a whisker of Dayron Robles's world record in Paris in July, was clear off the second hurdle and went away from Dwight Thomas of Jamaica to add another race to his unbeaten run in 2010.
Oliver said afterwards: "I wanted that Diamond League title - that was my number one goal this season. I've finally been healthy this year and things are working out."
Oliver delighted with injury-free season
New European champion Andy Turner was way down in eighth, with Will Sharman running a season's best of 13.39 secs in fourth.
Turner said: "I'm a little disappointed - I ran a decent heat. It was a dream come true to become European champion but I wanted to give the fans at Crystal Palace something to cheer about, and I'm disappointed I couldn't do that."
Felix, who is aiming to double up over the two distances at the London Olympics in two years time, was forced to fight down the home straight but maintained her silky form to win in 50.79 secs despite Firova and Dunn piling on the pressure.
"It was a really tough race, but I had the endurance to pull it out. I was a little doubtful but I just tried to rely on all the work I've put in," stated Felix.
Britain's men were both well beaten in a high-class 400m, former Olympic champion and twice world champion Jeremy Wariner coming past Jermaine Gonzales in the last 40m to win in 44.67.
Michael Bingham, silver medallist at the Europeans, started well but ran out of steam to finish in fourth, with local boy Martyn Rooney back in sixth - one place ahead of surprise European champion Kevin Borlee.
Wariner said: "I wasn't happy with my first 200m but the last 200m was great - I felt strong. In these weather conditions it was a good race."
Both Brits struggled to hide their disappointment. "Picking yourself up after the Europeans is hard," admitted Bingham. "I didn't execute in the last 100m but I was there at 300m - I just needed to finish off. I thought I was in a good place, but sometimes it doesn't work out."
Rooney said: "I'm sorry for the run. It was really poor - I got too carried away watching Wariner and trying not to go too fast, and went too slow. It was stupid."
Wariner put in a late charge to secure 400m victory
Three-time world champion Dwight Phillips was the class act in the long jump, making light of a difficult wind in front of the main stand to find a leap of 8.18m with his fourth round effort.
European bronze medallist Chris Tomlinson had a best of 7.92m in the same round for third behind Denmark's Morten Jensen. "I'm not happy with the jumps but I'm happy with the victory," said Phillips.
Wallace Spearmon dominated the men's 200m, pulling clear over the last 40 metres to win in 20.12 from Churandy Martina and Jaysuma Saidy Ndure.
Christian Malcolm, who was just one one-hundredth of a second away from European gold a fortnight ago, trailed home last in 20.81, with British team-mate Marlon Devonish in fifth.
Spearmon said: "I haven't won here since 2005, so it's great to come out on top here."
Britain's men also disappointed in the Emsley Carr Mile. Andy Baddeley had been strongly fancied for the European title but followed his poor performance in Barcelona with 11th place here, seven seconds down on winner Augustine Choge. Tom Lancashire was ninth.
The United States's Marshevet Myers was a surprise winner of a loaded 100m, holding off the favourite Carmelita Jeter and a field that included Sherone Simpson, Kelly-Ann Baptiste and Aleen Bailey in an impressive time of 11.01.
Myers said: "I had a great race and I'm now ready to go back to work. I knew it was going to be a hot race - the girls were very talented - so I just had to focus on my lane and running through the line."
New European champion Mariya Savinova kicked clear of Kenya's 2007 world champion Janeth Jepkosgei to win the 800m in 1:58.64, with Britain's Jemma Simpson coming through late for third.
Jenny Meadows, bronze medallist at the Europeans, was fifth with Lisa Dobriskey, normally a 1500m specialist, clocking a personal best of 2:00.14 in seventh.
Simpson was pleased afterwards with her 1:59.26. She said: "I'm getting there and getting more and more consistent - next year it's going to come."
Meadows was less happy with her display. "I made an absolute hash of that between 300m and 200m to go," she admitted. "I got boxed in and had to do a few steps almost on the spot. I was really annoyed with myself."
As well as a personal best it was a new Scottish record for Child as she clocked 55.16 for third in the 400m hurdles.
With Jamaica's Kaliese Spencer streaking clear, Child fought hard down the blustery home straight to hang on to second-placed Zuzana Hejnova, with European champion Natalya Antyukh down in sixth.
In the stadium where Britain's Steve Backley set the world record 20 years ago, Norway's Olympic, World and European champion Andreas Thorkildsen produced a throw of 87.38m to maintain his position atop the Diamond League rankings.
Thorskildsen maintained his dominance in the javelin competition
Germany's Matthias de Zordo was 41 centimetres back in second, with Finland's Tero Pitkamaki having to settle for third with a second-round effort of 82.24m.
Kate Dennison finished a respectable third in the pole vault, clearing 4.46m but failing with three attempts at a new British record height of 4.61m.
She was beaten on count-back by Brazil's Fabiana Murer and Israel's Jilian Schwartz, all three clearing the same height, but among her scalps was former world champion Svetlana Feofanova.
Russia's Ivan Ukhov, infamous for his drunken antics in Lausanne two years ago, took the high jump with 2.29m while Kenya's Milcah Chemos kicked past Yuliya Zarudneva to steal the women's 3,000m steeplechase on the line in a new meet record of 9 mins 22.49 secs.
There was also a personal best of 63.35m for Brett Morse, British discus number one, in a competition won by Olympic and world champion Gerd Kanter. The shot put was won by United States's former world champion Reece Hoffa with a season's best of 21.44m.
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