Barbara Pierre won on another day of home dominance at the World Indoor Championships ©Getty Images

A fast-start powered Barbara Pierre to victory over 60 metres on another day of United States domination at the International Association of Athletics Federations (IAAF) World Indoor Championships in Portland, with the host nation claiming four more victories.

Pierre, who represented Haiti at the Beijing 2008 Olympics before becoming a US citizen, shot out of the blocks before powering clear to win in 7.02 seconds.

She duly beat Dutch favourite, the 200m world champion and 100m silver medallist Dafne Schippers, by just two hundredths of a second.

"It was amazing," said the 29-year-old winner, a relay champion and individual 100m bronze medallist at last year's Pan American Games in Toronto.

"The crowd just gave me that extra bit.

"I said 'I'm at home I need to win this, nobody else.'"

It continued the superb personal best form Pierre showed last week in running 7.00 at the US Championships, equalling Schippers' world leading mark this season.

Elaine Thompson of Jamaica was third in 7.06 as Pierre emulated compatriot Trayvon Bromell's men's 60m victory yesterday.

There was no stopping another of America's biggest stars in Ashton Eaton as he cruised to heptathlon gold to emulate his Canadian wife Brianne Theisen-Eaton's pentathlon triumph yesterday.

Ashton Eaton claimed a third successive World Indoor heptathlon title ©Getty Images
Ashton Eaton claimed a third successive World Indoor heptathlon title ©Getty Images

They become the first married couple to win gold medals at the same World Championships.

Eaton clocked 6,470 points to claim a third successive World Indoor crown, finishing 188 points clear of his nearest rival Oleksiy Kasyanov of Ukraine.

Mathias Brugger scored a personal best 6,126 for a German bronze.

But two shock US victories came in the men's 800m and women's shot put.

Boris Berian was rewarded for high-risk front-running tactics in the two-lap distance, speeding through the first lap in 49.73 before a 56.10 second.

But, with rivals also fading, he held on to win in 1:45.83 ahead of Burundi's Antoine Gakeme, who clocked 1:46.65, and another American in Erik Sowinski, who claimed bronze in 1:47.22.

Michelle Carter then shocked New Zealand's Valerie Adams, one of the most dominant winners in the sport, to shot put gold.

In a thrilling competition, Adams and Carter each held the lead before Anita Marton unleashed a Hungarian record of 19.33m to lead in the final round.

With her final effort, however, Carter struck with a world leading 20.21 to seal the title. 

The US are now on eight gold medals, with no other country having managed more than one. 

Michelle Carter saved her best for last in the shot put ©Getty Images
Michelle Carter saved her best for last in the shot put ©Getty Images

Marton took silver while Adams, the two-time Olympic champion yet to return to her best following injury, claimed bronze in 19.25m.

Italy's Gianmarco Tamberi cleared 2.36m to win the men's high jump by four centimetres over Britain's Olympic bronze medallist Robbie Grabarz, who took silver, and US star Eric Kynard, who took bronze.

Qatar's defending champion Mutaz Essa Barshim had to settle for fourth in 2.29m. 

Other winners consisted of The Netherlands' Sifan Hassan, who won won the 1500m in 4:04.96 for a first Dutch title in the event since Elly van Hulst won in 1985.

She finished ahead of Ethiopians Dawit Seyaum and Gudaf Tsegay. who clocked 4:05.30 and 4:05.71 respectively.

Poland's Pavel Maslak won the 400m in 45.44 ahead of Qatar's Abdelelah Haroun, in 45.59, and Trinidad and Tobago's Deon Lendore, in 46.17.

China's Bin Dong took men’s triple jump gold with 17.33m, beating German teenager Max Hess, who recorded 17.14, and Frenchman Benjamin Compaore, who leaped 17.09.

The event, attended by IAAF President Sebastian Coe, is taking place in the absence of Russia, who remain suspended by the world governing body following allegations of systemic and state-sponsored doping.