The 25-year-old Swede started a memorable night by sending her nation on their way to a world record-equalling victory in the women’s 4x50 metres medley relay.

Leading Sweden out, Louise Hansson produced a strong first leg before handing over to her younger sister Sophie Hansson.

Sarah Sjöström and Michelle Coleman finished the job for Sweden as they registered a time of 1min 42.38sec to equal the world record set by the United States in 2018.

The US came home in 1:43.61 to take silver with The Netherlands claiming bronze in 1:44.03.

High on confidence, Louise Hansson then claimed gold in the women's 100m backstroke.

After moving ahead of Canada's Kylie Masse, Hansson kept her composure to clinch victory in 55.20.

Masse fell agonisingly short in 55.22 to seal silver, while Katharine Berkoff of the United States claimed bronze in 55.40.

Belarus' Ilya Shymanovich continued his superb form to secure men's 100m breaststroke gold in a championship record time.

Shymanovich made his intention clear as he forged ahead in the opening 25m and did not look back as he triumphed in 55.70.

He beat the previous championship record of 56.01 held by Cameron van der Burgh of South Africa.

Italy's Nicolo Martinenghi picked up silver in 55.80 with Nic Fink of the US finishing strongly to claim bronze in 55.87.

Shaine Casas won America’s first individual title of this year’s tournament after producing a stunning performance to win men's 100m backstroke gold.

The American swimmer won in 49.23 ahead of Kliment Kolesnikov of the Russian Swimming Federation (RSF) who earned silver in 49.46.

Romania's Robert Glinta grabbed bronze in 49.60.

Russian athletes are competing as the RSF in Abu Dhabi, as part of sanctions imposed by the World Anti-Doping Agency against Russia in December 2018 in connection with the manipulation of data from the Moscow Laboratory.

China's Zhang Yufei swept aside her rivals to secure women's 200m butterfly gold in sensational style.

Zhang powered ahead and established a sizeable lead as Maria Ugolkova of Switzerland moved into second and Anastasiia Markova of the RSF placed third at the halfway point.

There was no stopping Zhang as she pulled clear, leaving more than a body length between herself and everyone else.

She clinched the win in 2:03.01 with Charlotte Hook of the US coming back to take silver in 2:04.35.

Lana Pudar of Bosnia and Herzegovina produced a superb showing to bag bronze in 2:04.88.

Israeli teenager Anastasia Gorbenko emerged victorious from a closely-fought women's 50m breaststroke final with a time of 29.34.

Italy's Benedetta Pilato almost snatched victory but had to settle for silver in 29.50.

Sophie Hansson claimed bronze in 29.55.

South Korea's Hwang Sun-woo came from behind to snatch the men's 200m freestyle crown from Aleksandr Shchegolev of the RSF.

Shchegolev looked in superb form as he moved out in front ahead of Brazil's Fernando Scheffer and Hwang.

The trio continued to battle it out, with Shchegolev leading Hwang going into the final 25m.

Hwang kept the pressure on Shchegolev before overtaking him and winning in 1:41.60.

Shchegolev finished in 1:41.63 to seal silver with Lithuania's Danas Rapsys securing bronze in 1:41.73.

Margaret MacNeil produced a storming final leg to help Canada overhaul The Netherlands to claim mixed 4x50m freestyle relay gold.

Ryan Held gave the US the early lead, ahead of Joshua Liendo Edwards of Canada after the first leg.

Canada continued to occupy second spot with Yuri Kisil finishing behind Thom De Boer of The Netherlands.

Ranomi Kromowidjojo moved the Dutch team further in front before passing the baton on to Kira Toussaint for the final leg.

Toussaint tried to hold on for The Netherlands, but MacNeil secured victory for Canada in 1:28.55.

The Netherlands came second in 1:28.61 with the RSF securing bronze in 1:28.97.

Competition is scheduled to continue tomorrow.