Hungary's Katinka Hosszu won the gold medal in the women's 100-meter backstroke at the 2016 Olympics with a time of 58.45 seconds. She just beat out American Kathleen Baker, who finished in 58.75 seconds to take the silver. Canada's Kylie Masse and China's Fu Yuanhui were one hundredth of a second behind Baker at 58.76 seconds to split bronze.

It was a thriller right down to the end, with Hosszu finally pulling away in the final few strokes to take the win.

Baker was not considered a favorite entering Rio but consistently outpaced the competition early on. She finished first in both the preliminary heats and semifinals with the exact same time of 58.84 seconds. In the heats, Australia's Emily Seebohm finished second and Masse finished third. In the semifinals, Hosszu and Yuanhui took the next two spots after Baker.

Seebohm was considered one of the big names for this event. She won gold at the 2015 World Aquatics Championships after earning a silver medal at the 2012 Olympics in London. She struggled in the semifinals, though, finishing seventh, and she ended up seventh in the final, too.

Olivia Smoliga, the other American in the final, finished sixth with a time of 58.95 seconds. She finished sixth overall in the heats, then eighth in the semifinals.

It's been an impressive run for Baker, who swims for the University of California-Berkeley. She's a first-timer at the Olympics but hasn't looked like it. For the Americans, it's been big given the struggles of Missy Franklin, who dominated this event just four years ago.

At the 2012 Olympics, Franklin won gold medals in the 100m and 200m backstroke, including a world record in the latter. She is not swimming in the 100m backstroke this year, however, and failed to qualify for the 200m freestyle final Monday night. If she can't perform better in the 200m backstroke, she'll leave Rio without a medal.