page_title: CoCo Vandeweghe
section_title: 2015: Steady ranking, first Grand Slam quarterfinal
hierarchical_section_title: CoCo Vandeweghe / Professional career / 2015: Steady ranking, first Grand Slam quarterfinal
caption_attribution_description: Coco Vandeweghe
context_page_description: Colleen "CoCo" Vandeweghe is an American professional tennis player. A former Junior US Open champion at the age of 16, she has also won two WTA titles, both at the Rosmalen Grass Court Championships in Den Bosch. In 2017, she reached two Grand Slam semifinals and the final of the WTA Elite Trophy to move up to a career-high ranking of No. 9. In addition to her two Grand Slam semifinals in 2017 at the Australian Open and the US Open, Vandeweghe has twice reached the quarterfinals at Wimbledon in 2015 and 2017.
  Despite being predominantly a singles player, she also excels at doubles. In 2016, she partnered with Martina Hingis in much of the second half of the season and reached the semifinals of the US Open, a performance that lifted her to a then-career-high ranking of No. 18 in the world. In that year, she also reached two Grand Slam mixed doubles finals at the Australian Open and the US Open. In 2018, Vandeweghe won her first Grand Slam title, and, partnering Ashleigh Barty, she won the women's doubles title at the US Open. Later on, they reached the semifinals at the 2018 WTA Finals, lifting Vandeweghe to a new career-high ranking of No. 14.
context_section_description: Vandeweghe achieved her best Grand Slam result at the Australian Open, where she made the third round for the first time after victories over Francesca Schiavone and Samantha Stosur, falling to Madison Brengle.
  In 2015, just three days before the French Open, Vandeweghe and coach Maciej Synowka parted ways, having worked with each other for over a year. Vandeweghe is now coached by Craig Kardon, who has previously worked with star players like Martina Navratilova, Lindsay Davenport, Jennifer Capriati, and Ana Ivanovic.
  She upgraded her best Grand Slam result at Wimbledon, where she made the quarterfinals after victories over Anna Karolína Schmiedlová, 11th seeded Karolína Plíšková, 22nd seeded Samantha Stosur, and sixth-seeded Lucie Šafářová before falling in three sets to fourth-seeded Maria Sharapova.
  She made her first Grand Slam semifinals in doubles with Anna-Lena Grönefeld at the US Open.
caption: Coco Vandeweghe, 2015
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