Sarah Sjöström impressed on Thursday when she won the 50 meters freestyle in 23.08 - her second fastest time in her career and only 15 hundredths over the world record of the Dutch Ranomi Kromowidjojo.
When the double distance was completed on Friday, she had to settle for a second place.
British Anna Hopkin had the grip on second place with the last 25 meters left.
Then Sjöström put in the jerk and passed her.
The Swede finished in the time 51.34.
Hopkin crashed all the way to fifth place before it was over and was also beaten by Swedish Michelle Coleman who finished fourth in 52.16.
Sjöström's teammate in Energy Standard Siobhan Haughey, Hong Kong, kept the lead from start to finish and won at 51.11.
"This was fun"
The success continued in the 50 meter butterfly where Sjöström was the strongest and won at 24.75 - 25 hundredths ahead of Australian Holly Barratt.
Coleman finished sixth at 26.07.
Shortly afterwards, Sjöström had to reload for a 50 meter freestyle competition and showed class.
There, the swimmers compete in elimination races against each other at a fast pace, first eight swimmers, then four and in the final two.
The 28-year-old won both the first and second rounds before she also cleaned up Katarzyna Wasick in the final.
-This was fun.
It is not easy, but I am used to running such frequent races, says Sjöström in the victory interview according to DN.
Energy Standard thus took a superior victory in the playoffs where Sjöström became today's most valuable swimmer after collecting the most points.
Louise Hansson and Michelle Coleman's Toronto Titans finished second.