Hosszú, who claimed three gold medals at Rio 2016, picked up her first win in the women’s 100 metres backstroke with a time of 55.93sec.

Australia’s Emily Seebohm was her nearest challenger, finishing in 56.42, with Ukraine’s Daryna Zevina third in 56.43.

The Iron Lady went on to add the women’s 400m freestyle title in 4:02.83 and was joined on the podium by China’s Shao Yiwen, second in 4:03.95, and Australia’s Leah Neale, third in 4:04.01.

Hosszú then held off Jamaica’s Alia Atkinson to win the women’s 100m individual medley by 0.21 seconds with a time of 57.63 as Seebohm completed the top three in 58.10.

The 27-year-old closed her day by triumphing in the women’s 400m individual medley, posting 4:27.67 to condemn Japan’s Miho Takahashi to the runners-up spot in 4:31.20 ahead of Hungary’s Zsuzsanna Jakabos in 4:31.71.

Hosszú could have had five gold medals, but fell just short to Denmark’s Jeanette Ottesen in the women’s 100m freestyle with a time of 52.12.

Ottesen took the win in 51.84 and later added the women’s 50m butterfly crown in a time of 25.09.

On the men’s side, Germany’s Philip Heintz held off a late challenge from Great Britain’s James Guy to win the 200m freestyle in 1:43.13.  

He then claimed gold in the 200m individual medley, finishing more than 1.5 seconds clear of the rest of the field with a time of 1:52.03.

South Africa’s Chad Le Clos and Cameron Van der Burgh topped the podium in the men’s 100m butterfly and men’s 100m breaststroke respectively.

Le Clos won his event today in 49.05, while Van der Burgh triumphed in 56.42.

Jeremy Stravius won the men’s 50m backstroke in 22.85 before going on to help France claim the mixed 4x50m freestyle relay crown with a combined time of 1:30.74.  

Among the other victors today was Russia’s Vladimir Morozov, who won the men’s 50m freestyle in 20.81 having broken the 100m individual medley world record yesterday.

Atkinson came out on top in the women’s 50m breaststroke in 29.25, while there were also triumphs for Japan’s Rie Kaneto in the women’s 200m breaststroke in 2:16.99, Australia’s Mitchell Larkin in the men’s 200m backstroke in 1:50.10, and Czech Republic’s Jan Micka in the men’s 1,500m freestyle in 14:56.21.

Germany’s Franziska Hentke joined compatriot Heintz as an event winner today, posting 2:05.16 in the women’s 200m butterfly.

The second leg of the FINA Swimming World Cup is scheduled to take place in Berlin from August 30 to 31.