The penultimate day of the World Championships featured a world record for Ashton Eaton and more success for Mo Farah and Usain Bolt.
Ashton Eaton and Mo Farah underlined their status as two of athletics' most dominant figures by retaining their respective decathlon and 5000 metres titles in style at the World Championships in Beijing, while Jamaican relay success secured an 11th world crown for Usain Bolt.
Eaton broke new ground in the Bird's Nest Stadium, improving his own world record by six points as he completed the 1500m in four minutes and 17.52 seconds to finish with a remarkable haul of 9,045.
The American's outstanding performance, which saw him finish 350 points clear of nearest rival Damian Warner, was all the more impressive given he had not completed a decathlon in more than two years.
Farah, meanwhile, has now doubled up in the 5000m and 10,000m at three successive major events - a unique triple-double - and is the first man to win over the shorter distance three times in the World Championships.
Caleb Mwangangi Ndiku did his best to deny Farah as he hit the front with two laps remaining, only for the Briton to secure more glory with another powerful kick down the home straight.
There was to be no consolation victory for Justin Gatlin over Bolt - a clumsy final handover from the United States proving costly as Jamaica took gold in the men's 4x100m relay final with a world-leading time of 37.36.
Bolt - an unprecedented triple gold medalist at three World Championships - looked set to have much work to do as he prepared to receive the Jamaican baton for the final leg, but Tyson Gay was unable to cleanly set Mike Rodgers away for the USA.
Rodgers ultimately came home in second, well behind Bolt, and the USA were duly disqualified to hand China silver and Canada bronze.
Shelly-Ann Fraser-Pryce claimed her second gold medal of the week as Jamaica also won the women's 4x100m. The quartet of Veronica Campbell-Brown, Natasha Morrison, Elaine Thompson and individual 100m champion Fraser-Pryce left the USA trailing in their wake courtesy of a championship record time of 41.07, with Trinidad and Tobago taking bronze.
Marina Arzamasova of Belarus sprung a shock by beating defending champion Eunice Sum in the women's 800m to add a world title to the European crown she claimed last year.
A tight finish saw Arzamasova remain strong to hold off the challenge of Canada's Melissa Bishop and Sum, who had to settle for silver and bronze respectively.
In the women's high jump, Mariya Kuchina produced a personal best of 2.01m to take gold ahead of two-time winner Blanka Vlasic and reigning Olympic champion Anna Chicherova.
All three medalists cleared the same height, but Kuchina was victorious on countback having avoided any failures prior to her three unsuccessful attempts at jumping 2.03m.
It was a case of third-time lucky for Piotr Malachowski, who secured gold in the men's discus following runner-up finishes in 2009 and 2013.