Karolína Plíšková is a Czech professional tennis player. She is a former world No. 1 in singles, reaching the top of the Women's Tennis Association (WTA) rankings on 17 July 2017 and holding the position for eight weeks. On 31 October 2016, she peaked at world No. 11 in the doubles rankings. Known for her powerful serve and forehand, Plíšková has won 17 singles and five doubles titles on the WTA tour, 10 singles and six doubles titles on the ITF Circuit, and over $25 million in prize money. She has reached two Grand Slam singles finals at the 2016 US Open and the 2021 Wimbledon Championships. As a junior, Plíšková won the girls' singles event at the 2010 Australian Open. She has also played for the Czech Republic in Fed Cup competition.

The 2010 Australian Open was a tennis tournament that took place in Melbourne Park in Melbourne, Australia, from 18 to 31 January. It was the 98th edition of the Australian Open, and the first Grand Slam event of the year.