Rio 2016 Paralympic champion Petrúcio Ferreira dos Santos of Brazil broke his own men’s 100 metres T47 world record on his way to claiming gold here at the World Para Athletics Championships this evening.
The 20-year-old triumphed in 10.53sec, bettering the time he set to clinch Paralympic gold on home soil last year by 0.04 seconds.
"I always feel comfortable with the second half of my race, so I just went out and did what I knew I could do," Ferreira dos Santos, who missed the 2015 World Championships in Qatar's capital Doha through injury, said.
"This medal is just as important as my Paralympic gold because I haven't won one of these before."
Compatriot Yohansson Nascimento, the Rio 2016 bronze medallist, made it a Brazilian one-two in a season’s best 10.80.
Rio 2016 silver medallist Michal Derus of Poland finished third in a season’s best 10.81.
One of the two other world records broken on the track this evening was that in the women’s 200m T38 event by Great Britain’s Sophie Hahn.
Hahn crossed the line in 26.11 to eclipse the 26.46 set by Russia’s Margarita Goncharova in Italian city Grosseto in June 2016.
Germany’s Lindy Ave had to settle for silver despite clocking a personal best 27.02, while another Briton Kadeena Cox came third in a personal best 27.15.
"It feels absolutely incredible to break a world record in front of a home crowd, it's phenomenal," Hahn said.
"I never thought I was going to break a world record.
"I just thought go for the gold, it doesn't matter what time just as long as I cross the line first."
Also setting a world record in front of a home crowd was Samantha Kinghorn in the women’s 200m T53.
Kinghorn’s time of 28.61 broke her own world record of 28.67, which she set in American city Tempe in May.
Australia’s Angela Ballard was the runner-up in 29.09, while Turkey’s Hamide Kurt posted a personal best 30.02 for bronze.
There was another world record for Britain out in the field as Paralympic champion Hollie Arnold produced a throw of 43.02m in the women’s javelin F46.
New Zealand’s Holly Robinson posted an area record of 42.41m for silver and Thailand’s Surang Khamsuk finished third with a season’s best 29.86m.
In the men’s shot put F20, Malaysia’s Muhammad Ziyad Zolkefli broke his own world record to claim gold.
His throw of 17.29m bettered the 16.84m he posted to secure victory at last year's Paralympic Games in Rio de Janeiro.
"I came here to bring something back to my country," Zolkefli said.
"This is the second world record for me and I am so proud.
"I have trained so hard for this."
Ecuador’s Stalin David Mosquera took silver with an area record of 16.72m, while bronze was won by defending champion Todd Hodgetts of Australia with 15.96m.
The United States’ Cassie Mitchell was in world record-breaking form as well, winning the women’s discus throw F52 with 13.23m.
Fellow American Rachael Morrison was the runner-up with a season’s best 12.35m, while Ukraine’s Zoia Ovsii finished third with 11.97m.
There was more success for hosts Britain as Paralympic champion Richard Whitehead retained his men’s 200m T42 world title with a Championship record time of 23.26.
A season’s best of 23.95 for Paralympic silver medallist Ntando Mahlangu of South Africa ensured him silver.
Britain’s David Henson, the Rio 2016 bronze medallist, also posted a season’s best 24.73 to complete the top three.
Paralympic silver medallist Stef Reid had earlier won what was Britain's second gold medal of the World Championships, leading the way in the women’s long jump T44.
Reid had started as favourite in the absence of defending champion Marie-Amelie le Fur of France and she lived up to expectations by leaping 5.40m in the third round to claim her first world title.
She finished ahead of The Netherlands’ Marlene van Gansewinkel, who registered 5.29m.
Bronze went to Japan’s Maya Nakanishi with 5.00m.
Among the other winners today was Tunisia’s Walid Ktila, who claimed his ninth world title with victory in the men’s 100m T34.
A Championship record time of 15.00 held off Australia’s Rheed McCracken, second in 15.40, and the United Arab Emirates’ Mohamed Alhammadi, third in an area record of 15.75.
In today's first session, Ktila’s compatriot Raoua Tlili notched her third consecutive women’s discus throw F41 title on the world stage.
The Paralympic gold medallist, 27, managed a Championship record of 32.29m as she finished over six metres clear of her rivals.
Ireland’s Niamh McCarthy finished in second place with 26.17m, while bronze went to Tlili’s fellow countrywoman Samar Ben Koelleb with a personal best 25.83m.
In the men's 100m T33, Kuwait’s Ahmad Almutairi lived up to his pre-event billing to hold off home favourites Toby Gold, Andrew Small and Daniel Bramall.
Almutairi clocked a Championship record time of 17.00 with Gold second in 17.62 and Small third in 17.78.
In the women’s 200m T37, Ukraine’s Nataliia Kobzar triumphed with a Championship record time of 27.62.
France’s Mandy Francois-Elie came second in a personal best 28.04 and the US's Jaleen Roberts was third in an area record of 28.18.
Cuba’s Leinier Savon Pineda tasted victory in the men’s 100m T12 with a Championship record time of 10.72.
South Africa’s Ndodomzi Ntutu registered a season’s best 11.01 for second, while Spain’s Joan Munar Martinez came third in a personal best 11.09.
The last event of the evening on the track saw the US’s Tatyana McFadden take top honours in the women's 200m T54 with a Championship record time of 28.08.
McFadden, a 16-time Paralympic medallist, led an American podium sweep with Cheri Madsen second in 28.89 and her younger sister Hannah third in 29.49.
Other winners today included Serbia’s Milos Zaric in the men’s javelin throw F55 with a season’s best 30.83m, Latvia’s Diana Dadzite in the women’s shot put F55 with 8.01m, and Uzbekistan’s Khusniddin Norbekov in the men’s discus throw F37 with 54.73m.
Algeria's Nassima Saifi won the women's discus throw F57 with 34.05m, Tunisia's Maroua Ibrahmi took the women's shot put F32 crown with 5.86m, and Uganda’s David Emong came out on top in the men’s 1,500m T46 with a personal best 3:58.36.
The men’s 5,000m T11 title went the way of Kenya’s Samwel Mushai Kimani in 15:41.54, while China's Hu Jianwen won the men's long jump T38 with a season's best 6.80m.
A further two American victories came courtesy of David Brown, clocking 11.20 in the men's 100m T11, and Deja Young, in the women's 200m T47 with a season's best 25.10.
Action is due to continue tomorrow.