Claressa Shields punches ticket to London

"I always want to fight against the best," says Claressa Shields, who clinched a berth to the London Olympics. Tom McKenzie

An upset gave way to pure joy for boxer Claressa Shields.

Despite suffering the first loss of her amateur career at the Women's World Boxing Championships in Qinhuangdao, China, the 17-year-old from Flint, Mich., has earned a berth to the London Olympics. Women's boxing will be making its Olympic debut as a medal sport this summer.

According to the Detroit Free Press, Shields earned her spot when England's Savannah Marshall, who beat Shields earlier this week, won her semifinal bout and advanced to the finals of the middleweight division.

"It would mean everything to me to get a spot so that people could stop calling me an 'Olympic hopeful,' " Shields said prior to the world championships. "I know I can do it. I'm telling everyone I will be there."