Wozniak exhibited an interest in tennis as early as age three, wanting to follow in the footsteps of her older sister Dorata, who played competitively in the 1990s. Coached by her father, Antoni, young Aleksandra soon rose to the top of the sport at the junior level, and in 2005 was ranked third.

Wozniak began her professional career in November 2005. In November 2006, she won an International Tennis Federation (ITF) event in Pittsburgh and at the end of the season she was ranked 91st in the world. As a result, Tennis Canada named her Canada's female player of the year, female singles player of the year and most improved female player of 2006.

Aleksandra Wozniak's meteoric rise assured her direct entry into all four Grand Slam tournaments in 2007. Also in 2007, she reached her first career World Tennis Association (WTA) Tour final at Fes, Morocco. In 2008, she captured the Bank of the West Classic at Stanford, California, becoming the first Canadian woman to win a WTA world singles title since Jill Hetherington-Hultquist in 1988, and the first woman from Québec to achieve the honour. Her highest ranking is 21st in the world, achieved in June 2009.

Honours and Awards

Female Player of the Year, Tennis Canada (2004, 2006, 2008, 2009, 2012)
Athlete of the Year by Excellence, Tennis Québec (2007, 2009)
Bobbie Rosenfeld Award (2009)