Question: Are both Peng Shuai and Daniel Nestor professional sports players?

full_context: Document 1: Hsieh Su-wei: Hsieh Su-wei (born January 4, 1986) is a professional female tennis player from Taiwan. s of 25 2013 she was ranked No. 23 in the WTA Tour singles rankings and is the highest-ranked Taiwanese women's singles player ever. Currently she is the top-ranked WTA player from Taiwan in both singles and doubles.
Document 2: Daniel Negreanu: Daniel Negreanu ( ; born July 26, 1974) is a Canadian professional poker player who has won six World Series of Poker (WSOP) bracelets and two World Poker Tour (WPT) championship titles. The independent poker ranking service Global Poker Index (GPI) recognised Negreanu as the best poker player of the decade in 2014.
Document 3: Daniel Nestor: Daniel Mark Nestor {'1': ", '2': ", '3': ", '4': "} (Serbian Cyrillic: Данијел Несторовић; born September 4, 1972 as Danijel Nestorović) is a Canadian professional tennis player. He is one of the foremost doubles players in tennis history due to his longevity and continued success at the top of the men's game. s of 2016 , he is 11th for most men's ATP titles in Open Era history. In January 2016, Nestor became the first doubles player in ATP history to win 1000 matches.
Document 4: 2016 Dubai Tennis Championships – Men's Doubles: Rohan Bopanna and Daniel Nestor were the defending champions, but chose not to compete together. Bopanna played alongside Florin Mergea, but lost in the first round to Nestor and Radek Štepánek. Nestor and Štepánek lost in the quarterfinals to Łukasz Kubot and Marcin Matkowski.<br>
Document 5: 2009 China Open – Women's Doubles: Anabel Medina Garrigues and Caroline Wozniacki were the defending champion, but Wozniacki chose not to participate this year.Medina Garrigues partnered with Virginia Ruano Pascual, but they lost in the second round against Anastasia Pavlyuchenkova and Yanina Wickmayer.Hsieh Su-Wei and Peng Shuai won in the final 6-3, 6-1 against Alla Kudryavtseva and Ekaterina Makarova.
Document 6: Tennis at the 2010 Asian Games – Women's doubles: At the 2010 Asian Games in the Women's doubles tennis event, Zheng Jie and Yan Zi were the defending champions, but only Yan chose to participate, she partnered up with Peng Shuai.
Document 7: John Isner: John Robert Isner (born April 26, 1985) is an American professional tennis player who is currently ranked world No. 17 in men's singles by the Association of Tennis Professionals (ATP). Considered one of the best servers of the ATP World Tour, Isner achieved his career-high singles ranking of world No. 9 in April 2012. In 2013, he became the 18th player to serve more than 5,000 aces on the ATP World Tour. He currently has 4th-most aces in the history of ATP, having served more than 8,800 aces. At the 2010 Wimbledon Championships, he played the longest professional tennis match in history, defeating Nicolas Mahut in a total of 11 hours and 5 minutes of play over the course of three days. He also played the then 10th-longest singles match, a 5-hour 41-minute encounter in the second round of the 2012 French Open.
Document 8: 2017 Citi Open – Men's Doubles: Daniel Nestor and Édouard Roger-Vasselin were the defending champions, but chose not to participate together. Nestor played alongside Aisam-ul-Haq Qureshi, but lost in the first round to Rohan Bopanna and Donald Young. Roger-Vasselin teamed up with Steve Johnson, but lost in the first round to Jamie Murray and Bruno Soares.
Document 9: Juan Martín del Potro: Juan Martín del Potro (] , born 23 September 1988), also known as Delpo is an Argentinian professional tennis player who is currently ranked world No. 24 in men's singles by the Association of Tennis Professionals (ATP). His biggest achievement has been winning the 2009 US Open, defeating Rafael Nadal in the semifinal and 5-time defending champion Roger Federer in the final. He was the first to defeat both Federer and Nadal during the same major and was the only man outside the Big Four to win a major between the 2005 French Open and the 2013 US Open, a span of 35 tournaments. He is also the second Argentine and the fifth-youngest man to win the US Open in the Open Era. Other career highlights include winning the bronze medal in men's singles at the 2012 London Olympics and the silver medal at the 2016 Rio Olympics and being part of his country's successful Davis Cup team; but his career has also been hampered by a succession of wrist injuries.
Document 10: Li Na: Li Na (; ; born 26 February 1982) is a retired Chinese professional tennis player, who achieved a career-high WTA-ranking of world No. 2 on 17 February 2014. Over the course of her career, Li won seven WTA singles titles and two Grand Slam singles titles at the 2011 French Open and 2014 Australian Open. Li's rise to prominence came after those victories, which made her the first and only Grand Slam singles champion from East Asia and Asia as a whole. Prior to this, she had already become the first player representing an East Asian and Asian country to appear in a Grand Slam singles final, a milestone she achieved at the 2011 Australian Open. Li was also the runner-up at the 2013 Australian Open and 2013 WTA Tour Championships, a three-time quarterfinalist at Wimbledon and a semifinalist at the 2008 Beijing Olympic Games and 2013 US Open. Among her other most notable accolades, she was the first Chinese player to win a WTA tour title at the Guangzhou International Women's Open in 2004, the first to reach a Grand Slam singles quarterfinal at the 2006 Wimbledon Championships, and the first to break into the world's top 10. Her feats have sparked a major population growth of tennis players in East Asia, earning her the reputation as the region's tennis pioneer and trailblazer.
Document 11: Ilie Năstase: Ilie "Nasty" Năstase (] , born 19 July 1946) is a Romanian former world No. 1 professional tennis player, one of the world's top players of the 1970s. He was ranked world no. 1 from 23 August 1973 to 2 June 1974.
Document 12: Mark Knowles: Mark Knowles (born 4 September 1971) is a former tennis player from the Bahamas, specialising in doubles tennis. He has won a number of Grand Slam tournaments, most notably partnering with Daniel Nestor. At various times between 2002 and 2005 he was ranked World No. 1 in doubles. He is a five-time Olympian.
Document 13: Chan Yung-jan: Chan Yung-jan (, born August 17, 1989), also known as Latisha Chan, is a Taiwanese tennis player. She is now studying International Sports Management and Sports Drama Studies Ph.D. in National Sports University in Taiwan. She is known mainly for her success in doubles competitions, having won 26 WTA Tour titles, including the 2017 US Open. She also finished runner-up in three other Grand Slam finals: the 2007 and 2015 Australian Open, as well as the 2007 US Open. Highlights of her singles career include semifinals in the 2006 Japan Open and finals in the 2007 PTT Bangkok Open. She reached her career high singles ranking of No. 50 on June 11, 2007.
Document 14: Li Na career statistics: This is a list of the main career statistics of Chinese professional tennis player, Li Na. Over the course of her career, Li won nine WTA singles titles, including two Grand Slam singles titles at the 2011 French Open and 2014 Australian Open and one WTA Premier 5 singles title at the 2012 Western & Southern Open. She also finished in fourth place at the 2008 Beijing Olympics and was the runner-up at the 2011 and 2013 Australian Open and 2013 WTA Tour Championships. Li achieved a career high singles ranking of World No. 2 on February 17, 2014.
Document 15: Peng Shuai: Peng Shuai (; ; born 8 January 1986) is a Chinese professional female tennis player. She reached a career high ranking of World No. 1 in doubles by the Women's Tennis Association on 17 February 2014, making her the first Chinese professional tennis player (male or female, and in singles or doubles) to reach World No. 1. She won a gold medal at the 2010 Asian Games, defeating Akgul Amanmuradova in the final. At the 2013 Wimbledon Championships, Peng won her first ladies' double championship with Hsieh Su-wei of Taiwan and again won at the 2014 French Open with Hsieh.
ground_truth: yes