Caroline Wozniacki was born 11 July 1990. She is a Danish professional tennis player. She is the current World No. 1 on the WTA Tour. As of 4 July 2011, she has held this position for 38 weeks. She is the first Danish tennis player to hold the top ranking position and 20th overall. Since her WTA debut in 2005, she has improved her year-end ranking each year until finishing on top in 2010.