Question: Margaret Court and Ana Ivanovic play which sport?

Context paragraphs:
2014 Maria Sharapova tennis season: The 2014 Maria Sharapova tennis season officially began on 30 December 2013 with the start of the 2014 WTA Tour.  Sharapova began the season, having only played one match since the previous June due to a shoulder injury, at the Brisbane International.  After failing to defend her points during the winter and spring hard court season, Sharapova almost dropped out of the Top 10.  She rebounded by dominating the clay court season which saw her win Stuttgart, Madrid and the French Open.  Her only loss on clay came to a resurgent Ana Ivanovic.  She then won her first hard court title since the 2013 BNP Paribas Open at the China Open.  Her season ended on 24 October 2014 following her elimination from the round robin stage at the 2014 WTA Finals in Singapore.  She ended the year raned No. 2 behind Serena Williams.

2010 Billie Jean King Cup: The 2010 Billie Jean King Cup was the 2nd edition of this tennis exhibition tournament.  Seven-time Grand Slam champion Venus Williams, 2009 French Open Champion Svetlana Kuznetsova, and 2009 US Open Champion Kim Clijsters participated.  2009 Australian Open and Wimbledon Champion Serena Williams had to withdraw from the event due to a leg injury.  She was replaced by 2008 French Open Champion Ana Ivanovic.  In the first semifinal, Clijsters defeated Ivanovic in a tiebreaker (7–2), despite Ivanovic having match point at 5–4 up.  Williams defeated Kuznetsova in the second semifinal, 6–4.  Williams defeated Clijsters in the championship match by a score of 6–4 3–6 7–5.

2012 BNP Paribas Open – Women's Singles: At the 2012 BNP Paribas Open – Women's Singles, played at Indian Wells, California in March 2012, the defending champion Caroline Wozniacki lost to Ana Ivanovic in the fourth round, the second consecutive year Ivanovic had knocked out the defending champion.  World No. 1 Victoria Azarenka won her first Indian Wells Title by beating World No. 2 Maria Sharapova 6–2 6–3 in the final.

2016 Dubai Tennis Championships – Women's Singles: Simona Halep was the defending champion, but lost to Ana Ivanovic in the second round.

Ana Ivanovic career statistics: This is a list of the main career statistics of Serbian professional tennis player, Ana Ivanovic.  Ivanovic won fifteen WTA singles titles including one grand slam singles title at the 2008 French Open and three WTA Tier I singles titles.  She was also the runner-up at the 2007 French Open and 2008 Australian Open and a semi-finalist at the 2007 Wimbledon Championships and 2007 WTA Tour Championships.  On June 9, 2008 Ivanovic became the world No. 1 for the first time in her career.

2014 Ana Ivanovic tennis season: The 2014 Ana Ivanovic tennis season officially began with the start of the 2014 ASB Classic event in Auckland and ended with the 2014 WTA Finals.  Ivanovic entered the season as the number 16th ranked player and wasn't defending champion at any tournament.

Margaret Court: Margaret Court {'1': ", '2': ", '3': ", '4': "} (née Smith; born 16 July 1942), also known as Margaret Smith Court, is a retired Australian tennis player and former world No. 1.  She is currently a Christian minister in Perth, Western Australia.  In tennis, she amassed more major titles than any other player in history.

Ivanovic–Janković rivalry: Serbian tennis players Ana Ivanovic and Jelena Janković are both former world No. 1 and have met 12 times so far.  Their overall head-to-head series is 9–3, in Ivanovic's favor.  Janković is two years older than Ivanovic, so their paths connect them to play each other.  They are the first female players to achieve major successes for independent Serbia.

Ana Ivanovic: Ana Ivanovic (Serbian: Ана Ивановић, "Ana Ivanović" ; ] ; born 6 November 1987) is a retired Serbian tennis player.  She was ranked No. 1 in the world in 2008, after she had defeated Dinara Safina to win the 2008 French Open.  She was also the runner-up at the 2007 French Open and the 2008 Australian Open.  She also qualified for the annual WTA Tour Championships three times, in 2007, 2008 and 2014 and won the year-end WTA Tournament of Champions twice, in 2010 and 2011.

2008 Ana Ivanovic tennis season: The 2008 Ana Ivanovic tennis season officially began on 8 January with the start of the 2008 Medibank International Sydney in Sydney and ended with the 2008 WTA Tour Championships.  Ivanovic entered the season as the number four ranked player and the defending champion at three tournaments and finalist at previous year's French Open.

Supporting paragraphs: Margaret Court Ana Ivanovic
Answer: tennis