The American had already earned the 800m freestyle earlier in the meet at the WFCU Centre, but doubled her tally with a well-paced effort, which saw her finish in a winning time of 3min 57.78sec.

Smith would end a second clear of her nearest challenger Veronika Popova of Russia, while Japan’s Chihiro Igarashi claimed the bronze medal in a time of 3:59.41.

Hungary’s Katinka Hosszu would miss the podium by finishing in fourth place, but she had already earned her fifth gold medal in Canada by winning the women’s 100m individual medley.

The defending champion ended in a time 57.24 to successfully defend her title, with Australia’s Emily Seebohm and Jamaica’s Alia Atkinson rounding off the podium places by clocking 57.97 and 58.04 respectively.

There was joy for Denmark’s Jeanette Ottesen as she improved on her women’s 50m butterfly silver medal from the 2014 Championships in Doha.

The 28-year-old would win the event in a time of 24.92 to win her maiden individual short course gold medal, while also adding the long course title she won in the event at Barcelona in 2013.

America’s Kelsi Worrell was forced to settle for the silver medal by ending in 25.27, while Japan’s Rikako Ikee was just 0.05 seconds behind in third.

The Netherlands’ Jesse Puts secured a surprise gold in the men’s 50m freestyle, triumphing in a time of 21.10.

Russia’s Vladimir Morozov had been the pre-race favourite but would have to make do with the runner-up spot by ending in 21.14, while a time of 21.23 saw Lithuania’s Simonas Bilis take bronze.

Morozov, the world record holder, would find himself out of the medal places entirely in the men’s 100m individual medley.

While the Russian could only manage sixth, America’s Michael Andrew came through to win the gold in a time of 51.84.

The Japanese duo of Daiya Seto and Shinri Shioura earned podium positions by clocking 52.01 and 52.17.

There was further cause for Japanese celebration when Junya Koga triumphed in the men’s 50m backstroke, finishing in 22.85.

France’s Jeremy Stravius took the silver medal in 22.99, while 23.03 was good enough for Belarus’ Pavel Sankovich to win bronze.

Russia would claim gold medals in both relay events contested today, with Morozov producing a strong last leg to guide his team to victory in the 4x50m freestyle, with their quartet clocking 1:24.32.

The United States and Japan would the silver and bronze medals respectively, having finished in 1:24.47 and 1:24.51.

Russia would conclude the evening by winning the men’s 4x200m freestyle relay in a time of 6:52.10, with the United States second again in 6:53.34.

Japan would edge out Australia for the bronze medal, as they completed the distance in 6:53.54.