The 24-year-old’s first victory of the day at the Hamad Aquatic Centre came in the 100 metres breaststroke, clocking a time of 56.97sec to finish 0.15 seconds ahead of nearest challenger Felipe Lima of Brazil and a further 0.95 seconds clear of Japan’s Daiya Seto in third.

A time of 21.05 in the 50m freestyle was enough to double Morozov’s tally as Great Britain’s Benjamin Proud came second in 21.22 and South Africa’s Chad le Clos third in 21.34.

Le Clos went two better in the men’s 200m freestyle and men’s 100m butterfly, posting respective winning times of 1:42.84 and 50.23.

Britain’s James Guy was the runner-up in the 200m freestyle in 1:43.17, just 0.03 seconds quicker than Le Clos' compatriot Myles Brown in third.

The 100m butterfly silver went the way of Japan’s Takeshi Kawamoto in 50.44, while Belarus’ Pavel Sankovich took bronze in 50.98.

In women’s competition, Hungary’s Katinka Hosszú continued to exert her dominance by winning five events.

One of those victories was a tie with Australia’s Madeline Groves, with whom she shared the 200m butterfly crown. 

Both touched home in 2:03.34 and were joined on the podium by Hungary’s Zsuzsanna Jakabos, the third-place finisher in 2:07.12.

Hosszú performed strongly as ever in the individual medleys, giving her golds in the 100m in 57.82 and the 400m in 4:31.18.

The United States’ Katie Meili finished second in the 100m individual medley in 59.19, with Jamaica’s Alia Atkinson third in 1:00.51.

Jakabos came closest to matching Hosszú in the 400m individual medley with a time of 4:33.39, 8.79 seconds faster than Australia’s Tessa Wallace in third.

Hosszú was also the first swimmer to the wall in the 100m backstroke in 56.44 and 400m freestyle in 4:03.94.

Ukraine’s Daryna Zevina finished second in the 100m backstroke in 57.26, with China’s Cheng Haihua third in 58.05.

China’s Fang Yi provided the biggest threat to Hosszú in the 400m freestyle with a time of 4:04.82, while Jakabos rounded out the podium in 4:06.50.

The Iron Lady did not have everything her own way though and had to settle for silver in the 100m freestyle behind Denmark’s Jeanette Ottesen. 

Hosszú was 1.05 seconds shy of Ottesen’s winning time of 51.58, but she managed to hold off Groves, third in 52.89, for the runners-up spot. 

The order of the podium was replicated in the women’s 50m butterfly with Ottesen first in 25.13, Hosszú second in 25.98 and Groves third in 26.14.