In Rio de Janeiro 2016, Sarah Sjöström won three individual medals: one gold, one silver and one bronze.
In Tokyo 2021, there will be a maximum of one.
After finishing seventh in the 100 meter butterfly on Monday, she finished last night in the 100 meter freestyle.
Sjöström, who broke his right elbow in February, was a bit behind at the start and turned as the eighth and last swimmer.
In the second half, she approached the lead, but did not get further up than in fifth place.