Later that year she was given a wildcard to the qualifying draw at Wimbledon, where she was beaten in the first round by Miho Saeki.
However, Wozniacki went on to win the Wimbledon girls' singles tournament, beating Slovak Magdaléna Rybáriková in the finals.
She wore her first 'Adidas by Stella Mc Cartney' tennis dress at the 2009 US Open.
In the Nordea Nordic Light Open, her other WTA tournament of the year, she lost to Martina Suchá in the first round.
She again lost in the third round to the eventual champion and world No. Wozniacki won her first WTA Tour title at the Nordic Light Open in Stockholm without dropping a set, defeating fifth seed Anabel Medina Garrigues in the quarterfinals, top seed and world No.
10 Agnieszka Radwańska in the semifinals, and Vera Dushevina in the final.
She was runner-up at the 2009 US Open and the 2010 WTA Tour Championships to Kim Clijsters, and at the 2014 US Open to Serena Williams.
She won the 2006 Wimbledon girls' singles title and also holds two WTA titles in doubles.