Question: Who won more Grand Slam singles titles Li Na or Larisa Neiland?

full_context: Document 1: 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 2: 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.
Document 3: Larisa Neiland: Larisa Savchenko-Neiland (née Savchenko; born 21 July 1966) is a former professional tennis player who represented the Soviet Union and Latvia. A former world number one ranked doubles player, Neiland won two women's doubles Grand Slam titles and four mixed doubles Grand Slam titles. She also won two singles titles and sixty-five doubles titles.
Document 4: Lindsay Davenport: Lindsay Ann Davenport Leach (born June 8, 1976) is an American former professional tennis player. She was ranked World No. 1 on eight different occasions, for a total of 98 weeks. Davenport is one of five women who have been the year-end World No. 1 at least four times (1998, 2001, 2004, and 2005) since 1975; the others are Chris Evert, Steffi Graf, Martina Navratilova and Serena Williams. She has achieved the No. 1 ranking in doubles as well.
Document 5: 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 6: Caroline Wozniacki career statistics: This is a list of the main career statistics of professional Danish tennis player Caroline Wozniacki. To date, Wozniacki has won twenty-six WTA singles titles including two WTA Premier Mandatory singles titles and three WTA Premier 5 singles titles. She was also the runner-up at the 2009 US Open, 2010 WTA Tour Championships, and 2014 US Open, a semi-finalist at the 2010 US Open, 2011 Australian Open and 2011 US Open and a quarterfinalist at the 2010 French Open and 2012 London Olympics. Wozniacki was first ranked World No. 1 by the Women's Tennis Association (WTA) on October 11, 2010.
Document 7: Virginia Wade: Sarah Virginia Wade, (born 10 July 1945) is a former professional tennis player from Great Britain. She won three Grand Slam singles championships and four Grand Slam doubles championships, and is the only British woman in history to have won titles at all four Grand Slam tournaments. She was ranked as high as No. 2 in the world in singles, and No. 1 in the world in doubles.
Document 8: Elizabeth Smylie: Elizabeth Smylie (née Sayers, born 11 April 1963), sometimes known as Liz Smylie, is a retired Australian professional tennis player. During her career, she won four Grand Slam titles, one of them in women's doubles and three in mixed doubles. She also won three singles titles and 36 doubles titles.
Document 9: Martina Hingis: Martina Hingis (born 30 September 1980) is a Swiss professional tennis player, a former world No. 1 singles player and currently ranked world No. 2 in doubles by the WTA. She has spent a total of 209 weeks as the singles No. 1 and has won five Grand Slam singles titles, thirteen Grand Slam women's doubles titles, winning a calendar-year doubles Grand Slam in 1998, and seven Grand Slam mixed doubles titles; for a combined total of twenty-five major titles. In addition, she has won the season-ending WTA Championships two times in singles and three times in doubles, and an Olympic silver medal.
Document 10: Natasha Zvereva: Natasha Zvereva, or Zverava, (born Natallya Maratawna Zverava; Belarusian: Наталля Маратаўна Зверава; 16 April 1971) is a former tennis player from Belarus. Zvereva was the first major athlete in the Soviet Union to demand publicly that she should be able to keep her tournament earnings. The team of Zvereva and Gigi Fernández won more women's doubles titles and Grand Slam women's doubles championships than any other team since that of Martina Navratilova and Pam Shriver.
Document 11: Helena Suková: Helena Suková (] ) (born 23 February 1965) is a former professional tennis player from the Czech Republic. During her career, she won 14 Grand Slam doubles titles, 9 of them in women's doubles and 5 of them in mixed doubles. She also was a four-time Grand Slam singles runner-up and won 10 singles titles and 69 doubles titles.
Document 12: 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 13: Zaiga Jansone: Zaiga Jansone-Ivanova (born (1951--)24 1951 ) is a former Soviet Latvian tennis player and tennis coach. She was a five-time Soviet champion in women's doubles, 1973 Summer Universiade champion in women's doubles (all with Olga Morozova) and winner of the exhibition tennis event of 1968 Olympics in mixed doubles (with (Vladimir Korotkov).
Document 14: 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.
Document 15: Samantha Stosur career statistics: This is a list of the main career statistics of professional Australian tennis player, Samantha Stosur. To date, Stosur has won eight WTA singles titles including one Grand Slam singles title at the 2011 US Open. She was also the runner-up at the 2010 French Open and a semi-finalist at the 2010 and 2011 WTA Tour Championships. Stosur has also enjoyed a successful doubles career, in which she has held the World No. 1 ranking and won twenty-four WTA doubles titles including two grand slam women's doubles titles at the 2005 US Open and 2006 French Open and two year-ending championships at the 2005 and 2006 WTA Tour Championships.
ground_truth: Li Na