Katinka Hosszu of Hungary won the gold medal in the women's 100-meter backstroke, her second gold medal of the Rio Olympics.
Kathleen Baker of the United States took the silver, and Canada's Kylie Masse and China's Yuanhui Fu tied for the bronze.
In other women's swimming action, Missy Franklin, one of the United States' top swimming stars at the 2012 Olympics, endured another stunning disappointment Monday night, failing to even make the final of the 200-meter freestyle in Rio.