Petra Kvitová (Czech pronunciation: ; born 8 March 1990) is a Czech professional tennis player. Known for her powerful left-handed groundstrokes and variety, Kvitová turned professional in 2006 and has won 20 career singles titles which includes two Grand Slam titles at the Wimbledon Championships, in 2011 and 2014. She is also an Olympic medalist, capturing the bronze medal at the 2016 Rio Olympics. She reached her career-high ranking of world No. 2 on 31 October 2011 and as of 15 January 2018, is ranked world No. 28 by the Women's Tennis Association (WTA). As such, Kvitová is the current third highest-ranked Czech and the second highest-ranked left-handed player on the WTA behind Karolína Plíšková and Barbora Strýcová, and Germany's Angelique Kerber, respectively.
Kvitová first gained notice upon defeating then-world No. 1 Dinara Safina in the third round of the 2009 US Open. This was followed by her first Grand Slam semifinal appearance at the 2010 Wimbledon Championships where she came up short to eventual champion Serena Williams. Then, during her breakthrough season in 2011, Kvitová won her first Grand Slam title at the Wimbledon Championships, defeating Maria Sharapova in the final, thus becoming the first player of either gender born in the 1990s to win a Grand Slam title. She also won the WTA Tour Championships, thus becoming the third player to win the tournament on debut, the others being Williams and Sharapova. She also helped lead the Czech Republic to victory in the Fed Cup final that same year. It was the Czech Republic's first Fed Cup title as an independent nation.