Question: What sport have both Scott Lipsky and Mara Santangelo played on a professional level?

Context paragraphs:
2010 Monterrey Open – Doubles: Nathalie Dechy and Mara Santangelo won the tournament in 2009, but Dechy retired from tennis later in the year and Santangelo chose to not participate this year. Iveta Benešová and Barbora Záhlavová-Strýcová won in the final 3–6, 6–4, [10–8] against Anna-Lena Grönefeld and Vania King.

2016 Estoril Open – Doubles: Treat Huey and Scott Lipsky were the defending champions, but chose not to compete together.  Huey played alongside Max Mirnyi, but lost in the semifinals to Eric Butorac and Lipsky. <br>

Mara Santangelo: Mara Santangelo (born 28 June 1981) is a former professional tennis player from Italy.  She retired from the sport on 28 January 2011.

2011 Bauer Watertechnology Cup – Doubles: Scott Lipsky and Rajeev Ram were the defending champions but Lipsky decided not to participate. <br>

2010 Internationaux de Strasbourg – Doubles: Nathalie Dechy and Mara Santangelo were the defending champions, but Dechy retired in 2009 and Santangelo chose not to compete this year.

2017 Estoril Open – Doubles: Eric Butorac and Scott Lipsky were the defending champions, but Butorac retired from professional tennis in September 2016 and Lipsky chose to compete in Istanbul instead.

2012 French Open – Mixed Doubles: Casey Dellacqua and Scott Lipsky were the defending champions.  Dellacqua chose not to participate this year while Lipsky partnered with Vladimíra Uhlířová, but they were defeated in the first round by Virginie Razzano and Nicolas Devilder. <br>

2010 ASB Classic – Doubles: Nathalie Dechy and Mara Santangelo were the defending champions, but Dechy retired from tennis before being able to defend the title, and Santangelo chose not to participate this year.

F. P. Santangelo: Frank-Paul Santangelo (born October 24, 1967) is a former American professional baseball player from the University of Miami, Sacramento City College and Oak Ridge High School (El Dorado Hills, California).  Santangelo played in the Major leagues from 1995 to 2001.  During his career, Santangelo played for the Montreal Expos, San Francisco Giants, Los Angeles Dodgers, and Oakland Athletics.  Santangelo is currently a broadcaster for the Washington Nationals.

Scott Lipsky: Scott Lipsky (born August 14, 1981, in Merrick, New York) is a professional tennis player from the United States.  He is primarily a doubles specialist.

Supporting paragraphs: Scott Lipsky Mara Santangelo
Answer: tennis