10 to one: Angelique Kerber's rise
CNN's Open Court looks at German star Angelique Kerber's ascent to the top of women's tennis.
05:10 - Source: CNN
Open Court 16 videos
Angelique Kerber of Germany celebrates a point against Dominika Cibulkova of Slovakia during their women's singles final match at the WTA Finals tennis tournament in Singapore on October 30, 2016. / AFP / ROSLAN RAHMAN        (Photo credit should read ROSLAN RAHMAN/AFP/Getty Images)
10 to one: Angelique Kerber's rise
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Naomi Osaka, of Japan, holds the trophy after defeating Serena Williams in the women's final of the U.S. Open tennis tournament, Saturday, September 8 in New York.
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Serena Williams of the US smashes her racquet while playing against Naomi Osaka of Japan during their Women's Singles Finals match at the 2018 US Open at the USTA Billie Jean King National Tennis Center in New York on September 8, 2018.
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Alize Cornet (FRA) plays her first round at the 2018 US Open at Billie Jean National Tennis Center in New York City, NY, USA, on August 28, 2018. Photo by Corinne Dubreuil/Abaca/Sipa USA(Sipa via AP Images)
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PARIS, FRANCE - JUNE 11:  Rafael Nadal of Spain celebrates victory with the trophy following the mens singles final against Stan Wawrinka of Switzerland on day fifteen of the 2017 French Open at Roland Garros on June 11, 2017 in Paris, France.  (Photo by Clive Brunskill/Getty Images)
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PARIS, FRANCE - JUNE 07:  Novak Djokovic of Serbia serves in the Men's Singles Final against Stanislas Wawrinka of Switzerland on day fifteen of the 2015 French Open at Roland Garros on June 7, 2015 in Paris, France.  (Photo by Julian Finney/Getty Images)
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NEW YORK, NY - SEPTEMBER 10:  Rafael Nadal of Spain bites the championship trophy during the trophy ceremony after their Men's Singles Finals match on Day Fourteen of the 2017 US Open at the USTA Billie Jean King National Tennis Center on September 10, 2017 in the Flushing neighborhood of the Queens borough of New York City. Rafael Nadal defeated Kevin Anderson in the third set with a score of 6-3, 6-3, 6-4.  (Photo by Clive Brunskill/Getty Images)
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NEW YORK, NY - SEPTEMBER 09:  Sloane Stephens of the United States poses with the championship trophy during the trophy presentation after the Women's Singles finals match on Day Thirteen of the 2017 US Open at the USTA Billie Jean King National Tennis Center on September 9, 2017 in the Flushing neighborhood of the Queens borough of New York City. Sloane Stephens defeated Madison Keys in the second set with a score of 6-3, 6-0.  (Photo by Elsa/Getty Images)
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NEW YORK, NEW YORK - SEPTEMBER 03: Denis Shapovalov of Canada reacts during his fourth round match against Pablo Carreno Busta of Spain on Day Seven of the 2017 US Open at the USTA Billie Jean King National Tennis Center on September 3, 2017 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Richard Heathcote/Getty Images)
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NEW YORK, NY - SEPTEMBER 09:  Sloane Stephens of the United States poses with the championship trophy during the trophy presentation after the Women's Singles finals match on Day Thirteen of the 2017 US Open at the USTA Billie Jean King National Tennis Center on September 9, 2017 in the Flushing neighborhood of the Queens borough of New York City. Sloane Stephens defeated Madison Keys in the second set with a score of 6-3, 6-0.  (Photo by Elsa/Getty Images)
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