On the Court
Did not play ITF, instead made her pro debut as a main draw wild card at Cincinnati in 2005, losing to No. 12 Paty Schnyder in the first round and finishing the year 0-2. Got her first pro win at Memphis in 2006, defeating No. 83 Kristina Brandi in three sets and reaching the tournament semifinals to move to No. 461 in the world.
Won back to back ITF tournaments to start 2007 to reach No. 160 in the world. Made her Grand Slam debut at Roland Garros in 2007, losing in the first round to Nathalie Dechy. First Grand Slam win came at Wimbledon, which pushed her into the Top 100. Also reached the second round of the US Open, then the semifinals at Tokyo.
Entered the public eye to start the 2008 season, reaching the fourth round of the Australian Open at age 17, upsetting two players in the Top 40. Proved it was no fluke by reaching the quarterfinals at Doha, beating a Top 10 player (No. 9 Marion Bartoli) for the first time, then the quarterfinals at Memphis and the fourth rounds at both Indian Wells and Miami. Reached the third round at Roland Garros and at Wimbledon to reach No. 30, then scored her first tournament title by winning Stockholm, including a victory over No. 10 Agnieszka Radwanska in the semifinals. After reaching the third round of the Olympics, she won New Haven with four wins over Top 20 players to jump up to No. 18 in the world. This led her to a fourth-round appearance at the US Open, then a third tournament victory, this one at Tokyo. Reached the Luxembourg final in late October, then won the ITF at Odesen to finish the season 58-20, ranked in the Top 15.
Reached the Memphis final early in 2009,then the quarterfinals of both Indian Wells and Miami. Scored a tournament victory at Ponte Vedra Beach, then reached the finals at Charleston. Reached the finals at Madrid to ascend to No. 10, then won Eastbourne to climb to ninth. Repeated at New Haven, then burst forward at the US Open, reaching the finals before losing to Kim Clijsters, but still jumping to No. 5 in the world. Qualified for the Tour Championships for the first time and reached the semifinals before retiring due to injury, going 2-2, to finish the season 67-24.
Climbed to No. 3 in the world following a fourth-round appearance at the 2010 Australian Open. Moved to No. 2 after making the Indian Wells final. Defended her title at Ponte Vedra Beach, then reached the French Open quarterfinals, losing to eventual champion Francesca Schiavone. Won the crown at Copenhagen, then the Rogers Cup in Montreal, then made it three straight at New Haven. Fell in the US Open semifinals, but bounced back to win Tokyo and Beijing to move to No. 1 in the world. Reached the finals of the Tour Championships before falling in three sets to Clijsters, finishing the year ranked No. 1 with a 62-17 record.
Dropped briefly to No. 2 in the world behind Clijsters, who won the 2011 Australian Open while Wozniacki was beaten in the semifinals. Reclaimed the top spot by winning Dubai and followed that up by claiming the title at Indian Wells. Added the crown at Charleston, Brussels and Copenhagen, but stumbled in the third round of the French Open and the fourth round of Wimbledon. Ended a summer swoon with her fourth straight title at New Haven, then was bounced in the semifinals of the US Open by Serena Williams. Went 1-2 at the Tour Championships, but still finished the year ranked No. 1 with a 63-17 mark.
Tumbled to No. 4 in the world early in 2012 after falling in the quarterfinals of the Australian Open to Clijsters. Did not reach a final until Copenhagen in early April, and was upset in the first round at Wimbledon to drop back to No. 8. Reached the quarterfinals at the 2012 Olympics, but continued to play short of her previous lofty clip, even losing in the New Haven semifinals after four straight titles there. Was upet in the first round of the US Open to drop outside of the Top 10, but promptly won her first title of the year at Seoul. Also won Moscow and reached the finals at Sofia to end the season with a 50-21 record.
Grand Slams: None
Season-Ending Singles Rankings: 2012: 10
Off the Court
Is the daughter of Piotr, a former professional soccer player and Anna, a volleyball player for the Polish national team. Her brother Patrik is also a professional soccer player. Is a big fan of the Harry Potter books. Speaks English, Polish and Danish fluently. Endorses Adidas, Sony Ericsson, Yonex and Turkish Airlines, among others.