The couple moved to Denmark when Piotr signed for the Danish football club B1909.
Her older brother, Patrik Wozniacki, is a former professional footballer in Denmark.
Wozniacki had a career-high junior ranking of No. 2 in the world.
1990
Caroline Wozniacki (born 11 July 1990) is a Danish professional tennis player.
2003
She made her debut on the ITF Junior Circuit, the premier 18-and-under junior tour that is run by the International Tennis Federation (ITF), in October 2003 at 13 years and 3 months old.
During her first month, she entered two Grade 5 events in Denmark, the lowest-level tournament on the tour.
Wozniacki reached the final at both singles events, winning the second over compatriot Hanne Skak Jensen.
2004
With this success, she moved up to Grade 3 and Grade 4 tournaments, winning her first four singles events of 2004.
Her win streak of five tournaments and 27 matches came to an end in April with a semifinal loss to Latisha Chan at the International Juniors Championships in Manila, her first event outside of Scandinavia as well as her first Grade 1 event.
From this point on, Wozniacki only competed in Grade A and Grade 1 events, the two highest-level tournaments.
She made her Grade A debut at Wimbledon before turning 14, losing her first main draw match to Bojana Bobusic.
Towards the end of the year, Wozniacki won her first Grade A title at the Osaka Mayor's Cup.
2005
Wozniacki won several junior tournaments in 2005, including the Orange Bowl.
She made her debut on the WTA Tour at Cincinnati's Western & Southern Open on 19 July 2005, losing to the top-seeded and eventual champion Patty Schnyder in the first round.
In the Nordic Light Open, her other WTA tournament of the year, she lost to Martina Suchá in the first round.
2006
A junior major champion, she won the 2006 Wimbledon girls' singles title over Magdaléna Rybáriková and was voted the WTA Newcomer of the Year in 2008.
In 2006, she was the top seed at the Australian Open (junior girls' singles), but lost the final to eighth-seeded Anastasia Pavlyuchenkova.
She was seeded second with partner Anna Tatishvili in the doubles tournament, but the pair was knocked out in the semifinals by the French-Italian pair of Alizé Cornet and Corinna Dentoni, who were seeded eighth.
In February at the Memphis, she reached her first WTA Tour quarterfinal, beating Kristina Brandi and Ashley Harkleroad before losing to third-seeded Sofia Arvidsson of Sweden.
Before Wimbledon Wozniacki won the Liverpool International Tennis Tournament, an exhibition tournament, beating Ashley Harkleroad in the final.
Later that year she was given a wild card 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 title, beating Magdaléna Rybáriková in the final.
In August, she reached another WTA Tour quarterfinal, this time at the Nordic Light Open in Stockholm.
She defeated top-100 players Iveta Benešová and Eleni Daniilidou, then lost to eventual champion and third-seeded Zheng Jie.
Wozniacki was seeded second in the US Open girls' singles.
In the first round, she won the first set against Russian Alexandra Panova, but was disqualified in the second set for verbally abusing an umpire.
Wozniacki was said to have used an expletive in referring to a linesman who made a disputed call.
2010
She was ranked world No. 1 in singles for a total of 71 weeks, including at the end of 2010 and 2011.
She achieved the top ranking for the first time on 11 October 2010, becoming the 20th player in the Open Era and the first from a Scandinavian country to hold the top position.
Known for her footwork and defensive abilities, Wozniacki won 30 WTA Tour singles titles (including six in both 2010 and 2011, the most in a year by a WTA player from 2008–2011) and two doubles titles.
2011
Other career highlights include winning three Premier Mandatory and three Premier 5 titles, reaching four major semifinals (the 2011 Australian Open and the 2010, 2011 and 2016 US Opens), three major quarterfinals (the 2012 Australian Open and the 2010 and 2017 French Opens), and the quarterfinals at the 2012 London Olympics.
2017
Wozniacki also won the season-ending WTA Finals in 2017, beating Venus Williams, after previously finishing runner-up to Clijsters at the event in 2010.
2018
In 2018, she became the first Dane to win a major singles title, at the Australian Open.
Before her victory at the 2018 Australian Open over Simona Halep, she had reached two major finals at the US Open, falling to Kim Clijsters in 2009 and to Serena Williams in 2014.
2020
Wozniacki retired on 24 January 2020, following a third-round loss at the Australian Open.
She became an ESPN commentator in 2022.
In June 2023, she announced a comeback at the Canadian Open in August, targeting the US Open and the 2024 Olympic Games.
Wozniacki was born in Odense, Denmark.
She is of Polish descent.
Her mother Anna played on the Polish women's national volleyball team, and her father Piotr played professional football.
