Question: What sport does Angelique Kerber career statistics and 2016 Australian Open have in common?

full_context: Document 1: 2016 Western &amp; Southern Open: The 2016 Western & Southern Open was a men's and women's tennis tournament played on outdoor hard courts from August 15–21, 2016. It was a Masters 1000 tournament on the 2016 ATP World Tour and a WTA Premier 5 tournament on the 2016 WTA Tour. The tournament was one of two headline events in the 2016 US Open Series. The 2016 tournament was the 115th men's edition and the 88th women's edition of the Cincinnati Masters. The tournament is held annually at the Lindner Family Tennis Center in Mason (a northern suburb of Cincinnati), Ohio, United States.
Document 2: 2016 US Open Series: In tennis, the 2016 US Open Series (known as Emirates Airline US Open Series for sponsorship reasons) is the thirteenth edition of the US Open Series, which includes a group of hard court tournaments that starts on July 18, 2016 in Stanford and concludes in Connecticut for the women and in Winston Salem for the men on August 27, 2016. This edition consists of three separate men's tournaments and three women's tournaments, with the Western & Southern Open hosting both a men's and women's event. The series is headlined by two ATP World Tour Masters 1000 and two WTA Premier 5 events.
Document 3: Petra Kvitová career statistics: This is a list of the main career statistics of Czech professional tennis player Petra Kvitová. To date, Kvitová has won 20 singles titles including two Grand Slam singles titles at the Wimbledon Championships, one WTA Tour Championships singles title, two WTA Premier Mandatory singles titles and four WTA Premier 5 singles titles. She was also the bronze medallist at the 2016 Rio Olympics, a semifinalist at the 2010 Wimbledon Championships, 2012 Australian Open and 2012 French Open and a quarterfinalist at the 2011 Australian Open, 2012 Wimbledon Championships, 2013 Wimbledon Championships, 2015 US Open and 2017 US Open. Kvitová reached her career-high ranking of world no. 2 on 31 October 2011.
Document 4: 2017 US Open – Women's Singles: Angelique Kerber was the defending champion, but lost in the first round to Naomi Osaka. This loss would cause Kerber to fall outside the top ten in the WTA rankings for the first time since 2015.
Document 5: 2016 Australian Open – Women's Singles: Serena Williams was the defending champion, and attempting for the second time to equal Steffi Graf's career record of 22 major singles titles. She lost in the final to Angelique Kerber, 4–6, 6–3, 4–6. Kerber became the first woman to win a singles major title after having saved a match point in the first round, which she did against Misaki Doi. She is also the first German of either sex to win a major since Graf at the 1999 French Open.
Document 6: Grand Slam (tennis): The Grand Slam tournaments, also called majors, are the four most important annual tennis events. They offer the most ranking points, prize money, public and media attention, the greatest strength and size of field, and greater number of "best of" sets for men. The Grand Slam itinerary consists of the Australian Open in mid January, the French Open in May and June, Wimbledon in July, and the US Open in August and September. Each tournament is played over a period of two weeks. The Australian and United States tournaments are played on hard courts, the French on clay, and Wimbledon on grass. Wimbledon is the oldest, founded in 1877, followed by the US in 1881, the French in 1891, and the Australian in 1905. However, of these four, only Wimbledon was a major before 1924–25, when all four became designated Grand Slam tournaments. Skipping Grand Slam tournaments—especially the Australian Open because of the remoteness, the inconvenient dates (around Christmas and New Year's Day) and the low prize money—was not unusual before 1982, which was the start of the norm of counting Grand Slam titles.
Document 7: 2016 Australian Open – Women's Doubles: Bethanie Mattek-Sands and Lucie Šafářová were the defending champions, but Šafářová withdrew before the tournament due to a bacterial infection. Mattek-Sands played alongside Sabine Lisicki, but lost in the second round to Anastasia and Arina Rodionova.
Document 8: 2016 Wimbledon Championships – Women's Singles: Serena Williams was the defending champion and successfully defended her title, defeating Angelique Kerber in the final, 7–5, 6–3. By winning her seventh Wimbledon title, Williams equaled Steffi Graf's Open Era record of 22 major singles titles. This was also the first time two women contested two major finals against one another in a single season since Amélie Mauresmo and Justine Henin-Hardenne met in the 2006 Australian Open and Wimbledon finals.
Document 9: 2016 Australian Open: The 2016 Australian Open was a tennis tournament that took place at Melbourne Park between 18–31 January 2016. It was the 104th edition of the Australian Open, and the first Grand Slam tournament of the year. The tournament consisted of events for professional players in singles, doubles and mixed doubles play. Junior and wheelchair players competed in singles and doubles tournaments.
Document 10: Australian Open: The Australian Open is a major tennis tournament held annually over the last fortnight of January in Melbourne, Australia. First held in 1905, the tournament is chronologically the first of the four Grand Slam tennis events of the year – the other three being the French Open, Wimbledon and the US Open. It features men's and women's singles; men's, women's and mixed doubles and junior's championships; as well as wheelchair, legends and exhibition events. Prior to 1988 the tournament had been played on grass courts, but since then two types of hardcourt surfaces have been used at Melbourne Park – green coloured Rebound Ace up to 2007 and, afterwards, blue Plexicushion.
Document 11: Angelique Kerber: Angelique Kerber (] ; born 18 January 1988) is a German professional tennis player and former world No. 1. Having made her professional debut in 2003, Kerber rose to prominence upon reaching the semifinals of the 2011 US Open as the no. 92 ranked player in the world. She ascended to the top of the rankings on 12 September 2016, thus becoming the twenty-second and oldest player to achieve the number one ranking for the first time and the first new number one player since Victoria Azarenka in 2012.
Document 12: Caroline Wozniacki career statistics: This is a list of the main career statistics of professional Danish tennis player Caroline Wozniacki. To date, Wozniacki has won twenty-six WTA singles titles including two WTA Premier Mandatory singles titles and three WTA Premier 5 singles titles. She was also the runner-up at the 2009 US Open, 2010 WTA Tour Championships, and 2014 US Open, a semi-finalist at the 2010 US Open, 2011 Australian Open and 2011 US Open and a quarterfinalist at the 2010 French Open and 2012 London Olympics. Wozniacki was first ranked World No. 1 by the Women's Tennis Association (WTA) on October 11, 2010.
Document 13: Angelique Kerber career statistics: This is a list of the main career statistics of German professional tennis player, Angelique Kerber. To date, Kerber has won ten WTA singles titles including two grand slam singles titles at the 2016 Australian Open and 2016 US Open and at least one title on each playing surface (hard, clay and grass). She was also the runner-up at the 2016 Wimbledon Championships and a Silver medalist at the 2016 Rio de Janeiro Olympics. Kerber became the world No. 1 for the first time in her career on 12 September 2016.
Document 14: 2016 Angelique Kerber tennis season: The 2016 Angelique Kerber tennis season officially began on 5 January with the start of the 2016 Brisbane International. Kerber entered the season as the number 10 ranked player and the defending champion at four tournaments.
Document 15: Margaret Court career statistics: This is a list of the main career statistics of Australian former tennis player Margaret Court. She won 64 Grand Slam events (24 singles, 19 doubles, 21 mixed doubles), which is a record for a male or female player. Her 24 Grand Slam singles titles and 21 in mixed doubles are also all-time records for both sexes. She achieved a career Grand Slam in singles, doubles, and mixed doubles. She is one of two women to have achieved "the" calendar year Grand Slam in singles in the Open Era (alongside Steffi Graf), and is the only woman to have achieved the mixed doubles Grand Slam, which she did twice.
ground_truth: tennis