Britain's Christine Ohuruogu reclaimed the World Championship 400 metres title with a dramatic victory in Moscow.
The 29-year-old took victory in the Luzhniki Stadium in 49.41 seconds, snatching the gold away from defending champion Amantle Montsho of Botswana who finished in the same time.
The Londoner made a trademark late burst to deny the African as she added to her medals collection, having won the 2008 Olympics and taking silver in London last year.
The victory was reminiscent of her World Championship triumph in Osaka in 2007 when she also powered her way down the home stretch to win the gold medal at the death.
It was Britain's second gold medal of the Championships after Mo Farah won the 10,000 metres, although golden girl Jessica Ennis-Hill is missing the event because of injury.
The victory put Ohuruogu in esteemed company as one of only three women to have won the World 400 title on two occasions.
Ohuruogu was ecstatic after setting a new British record as she told the BBC.
"I feel like I'm in a dream, I can't believe it. I just thank god that everything came together today. It has been really tough. It feels really surreal."
And she received praise from one-lap legend and Olympic champion Michael Johnson who told the BBC.
"Every 400m runner knows that Christine Ohuruogu is going to be dangerous on the home straight. I don't know why Montsho didn't realise that at the end. But three metres from the finish line she wasn't even in it. It was doing things in the right way that won it. You can see the determination on her face she wasn't going to leave anything on the track. She wanted it more."
Russian Antonina Krivoshapka claimed bronze in 49.78 seconds.
The event runs until Sunday.