Question: how is Nikola Pilić and Iveta Benešová related?

Context paragraphs:
2012 Barcelona Ladies Open – Doubles: Iveta Benešová and Barbora Záhlavová-Strýcová were the defending champions but Benešová decided not to participate. <br>

2006 Open Gaz de France – Doubles: Iveta Benešová and Květa Peschke were the defending champions but only Peschke competed that year with Émilie Loit.

Nikola Pilić: Nikola "Niki" Pilić (born 27 August 1939) is a retired Croatian professional tennis player who competed for SFR Yugoslavia.

2009 BGL Luxembourg Open – Doubles: Sorana Cîrstea and Marina Erakovic were the defending champions, but they chose not to participate this year. Iveta Benešová and Barbora Záhlavová-Strýcová won in the final 1-6, 6-0, [10-7] against Vladimíra Uhlířová and Renata Voráčová.

2010 BGL Luxembourg Open – Doubles: Iveta Benešová and Barbora Záhlavová-Strýcová were the defending champions.  They reached the final, where they lost to Timea Bacsinszky and Tathiana Garbin 4–6, 4–6.

2013 Porsche Tennis Grand Prix – Doubles: Iveta Benešová and Barbora Záhlavová-Strýcová were the defending champions, but Benešová decided not to participate. <br>

Iveta Benešová: Iveta Benešová (] ) (formerly Melzer, Czech: Melzerová ; born 1 February 1983) is a Czech former professional tennis player.  She began playing tennis at age of 7 and turned professional in 1998 in Prague.  She has won two WTA Tour events and one Grand Slam in mixed doubles partnering with Jürgen Melzer at the 2011 Wimbledon Championships.  On 14 September 2012 she married Jürgen Melzer and adopted his family name.  She announced her retirement from professional tennis via her Facebook page 13/08/2014.  In 2015, she divorced Melzer and reverted to using her maiden name.

2009 Porsche Tennis Grand Prix – Doubles: Anna-Lena Grönefeld and Patty Schnyder were the defending champions, but lost in the first round to Iveta Benešová and Barbora Záhlavová-Strýcová.

2008 Fortis Championships Luxembourg – Doubles: Iveta Benešová and Janette Husárová were the defending champions, but Husárová chose not to participate, and only Benešová competed that year.

2012 Apia International Sydney – Women's Doubles: Iveta Benešová and Barbora Záhlavová-Strýcová were the defending champions but were eliminated in the first round.

Supporting paragraphs: Nikola Pilić Iveta Benešová
Answer: tennis player