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

Context paragraphs:
Torben Beltz: Torben Beltz (born 27 November 1976) is a German tennis coach, best known for his work with 2016 Australian Open and 2016 US Open champion Angelique Kerber.

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.

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.

Lucie Šafářová career statistics: This list summarizes the main career statistics of Czech professional tennis player Lucie Šafářová.  To date, Šafářová has won seven WTA singles titles and fifteen WTA doubles titles including five Grand Slam doubles titles with Bethanie Mattek-Sands at the 2015 Australian Open and French Open,; the 2016 US Open and 2017 Australian Open and French Open.  Other highlights of Šafářová's career thus far include winning the 2015 Qatar Total Open, reaching the final of the 2015 French Open and making quarterfinal and semifinal appearances at the 2007 Australian Open and 2014 Wimbledon Championships, respectively.  Šafářová achieved career high singles and doubles rankings of World No. 5 and World No. 2 on 14 September 2015 and 30 January 2017.

Casey Dellacqua career statistics: This is a list of the main career statistics of professional Australian tennis player, Casey Dellacqua.  To date, Dellacqua has won eight career doubles titles: one grand slam mixed doubles title with Scott Lipsky at the 2011 French Open and seven WTA doubles titles including one Premier Mandatory doubles title with Yaroslava Shvedova at the 2015 Mutua Madrid Open.  Other highlights of Dellacqua's career include reaching the doubles finals of all four grand slams; a quarterfinal finish in singles at the 2014 BNP Paribas Open and fourth round appearances at the 2008 Australian Open and 2014 Australian Open and US Open respectively.  Dellacqua achieved a career high singles ranking of World No. 26 on September 29, 2014 and later achieved a career high doubles ranking of World No. 3 on February 1, 2016.

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.

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.

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.

Kei Nishikori career statistics: This is a list of the main career statistics of Japanese professional tennis player, Kei Nishikori.  To date, Nishikori has won 11 ATP singles titles including a record four consecutive titles at the Memphis Open.  Other highlights of Nishikori's career thus far include reaching the finals of the 2014 Mutua Madrid Open, 2016 Miami Open, 2016 Rogers Cup, and 2014 US Open, a semi-final appearance at the 2014 ATP World Tour Finals and 2016 US Open, quarterfinal finishes at the 2012 Australian Open, 2015 Australian Open, 2016 Australian Open and 2015 French Open.  Nishikori achieved a career high singles ranking of world No. 4 on March 2, 2015.

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.

Supporting paragraphs: Angelique Kerber career statistics 2016 Australian Open
Answer: tennis