Question: What do Matt Lucena and Andrea Hlaváčková have in common?

Context paragraphs:
2014 US Open – Women's Doubles: Andrea Hlaváčková and Lucie Hradecká were the defending champions, but chose not to participate together.  Hlaváčková played alongside Zheng Jie, but lost in the quarterfinals to Kimiko Date-Krumm and Barbora Záhlavová-Strýcová.  Hradecká teamed up with Michaëlla Krajicek, but lost in the third round to Zarina Diyas and Xu Yifan. <br>

2017 J&amp;T Banka Prague Open – Doubles: Margarita Gasparyan and Andrea Hlaváčková were the defending champions, but Gasparyan chose not to participate this year and Hlaváčková chose to compete in Rabat instead.

Andrea Hlaváčková: Andrea Hlaváčková (] ; born 10 August 1986) is a professional tennis player from the Czech Republic.  Her highest singles ranking is world No. 58, which she reached in September 2012, and her highest doubles ranking is No. 3, reached on 22 October 2012.  In her career, Hlaváčková has won 22 WTA doubles titles, as well as 19 ITF doubles and eight ITF singles titles.  She has won two Grand Slam doubles titles, the 2011 French Open and the 2013 US Open, both times partnered with Lucie Hradecká.  The pair are also the 2012 Olympic silver medallists.  Hlaváčková was part of the winning Czech team in Fed Cup 2012 and also won the mixed doubles title at the 2013 US Open paired with Max Mirnyi.

2010 Gastein Ladies – Doubles: Andrea Hlaváčková and Lucie Hradecká were the defending champions, but Hlaváčková chose not to participate.

2015 China Open – Women's Doubles: Andrea Hlaváčková and Peng Shuai were the defending champions, but Peng could not participate due to injury.  Hlaváčková played alongside Lucie Hradecká, but lost in the quarterfinals to Casey Dellacqua and Yaroslava Shvedova. <br>

2011 Aegon GB Pro-Series Barnstaple – Doubles: Andrea Hlaváčková and Michaëlla Krajicek were the defending champions, but Hlaváčková chose not to participate.  Krajicek competed with Caroline Garcia, but lost in the semifinals to Eva Birnerová and Anne Keothavong.

Matt Lucena: Matt Lucena (born August 4, 1969) is a former professional tennis player from the United States.  He won the mixed doubles title at the 1995 US Open.

2008 ECM Prague Open – Women's Doubles: Petra Cetkovská and Andrea Hlaváčková were the defending champions, but Cetkovská chose not to participate, and only Hlaváčková competed that year.

2017 Aegon Open Nottingham – Women's Doubles: Andrea Hlaváčková and Peng Shuai were the defending champions, but Peng chose not to participate and Hlaváčková chose to compete in s'Hertogenbosch instead.

2014 US Open – Mixed Doubles: Andrea Hlaváčková and Max Mirnyi were the defending champions, but chose not to participate together.  Hlaváčková played alongside Alexander Peya, but lost in the second round to Taylor Townsend and Donald Young.  Mirnyi teamed up with Chan Hao-ching, but lost in the second round to Ashleigh Barty and John Peers.

Supporting paragraphs: Matt Lucena Andrea Hlaváčková
Answer: professional tennis player