Question: Between Hana Mandlíková and Johan Kriek, who won more Grand Slam singles at the French Open?
Context: Roger Federer won two Majors in 2009, the French Open, defeating Robin Söderling in the final, and the Wimbledon Championships with a victory over Andy Roddick.  In addition, Federer made two other Grand Slam finals, Australian Open losing to Rafael Nadal, and the US Open, losing to Juan Martín del Potro.  Federer went on to win two other Master Series 1000 tournaments: in Madrid over Rafael Nadal, and in Cincinnati over Novak Djokovic.  He lost in one 500 level event final in Basel to Djokovic.  During the year, Federer completed the Career Grand Slam by winning his first French Open title, and won a record fifteenth Grand Slam singles title, one more than Pete Sampras' mark of fourteen. Hana Mandlíková was the defending champion, but was defeated by Steffi Graf in the quarterfinals.  Graf ended up winning the tournament, defeating Chris Evert in the final, 6–1, 7–6.  This would be Chris Evert's 34 appearance in a Grand Slam final, an Open Era record, and her 6th final, Evert made the final in every Australian Open she played.  This was the first Grand Slam Final played under a roof.  There was an 1 hour and 23 minute delay to close the roof at 1-1 in the first set.  This was Graf's first step towards completing the first and so far only calendar year Golden Slam. Johan Kriek (born April 5, 1958) is a South African-American professional male tennis player and founder of the Global Water Foundation, a non-profit organization dedicated to delivering clean water to the world's neediest communities.  Kriek won two Australian Opens and reached the semifinals at the French Open and US Open, as well as the quarterfinals of Wimbledon.  He won 14 professional singles and 8 doubles titles, reaching a career-high singles ranking of World No. 7.  Kriek's most memorable wins include victories over Andre Agassi, Jimmy Connors, John McEnroe, Guillermo Vilas, Stefan Edberg, Michael Chang, Vitas Gerulaitis and Björn Borg. Yevgeny Aleksandrovich Kafelnikov (Russian: Евгений Александрович Кафельников ] ; born 18 February 1974) is a Russian former world No. 1 tennis player.  He won two Grand Slam singles titles, the 1996 French Open and the 1999 Australian Open.  He also won four Grand Slam doubles titles, being the last man to have won both the men's singles and doubles titles at the same Grand Slam tournament, which he did at the 1996 French Open. The Williams sisters are two professional American tennis players: Venus Williams (b. 1980), a seven-time Grand Slam title winner (singles), and Serena Williams (b. 1981), twenty-three-time Grand Slam title winner (singles), both of whom were coached from an early age by their parents Richard Williams and Oracene Price.  There is a noted professional rivalry between them – between the 2001 US Open and the 2017 Australian Open tournaments, they met in nine Grand Slam singles finals.  They became the first two players, female or male, to play in 4 consecutive grand slam singles finals from the 2002 French Open to the 2003 Australian Open; Serena famously won all 4 to complete the first of two "Serena Slams".  Between 2000 and 2016, a 17-year span, they collectively won 12 Wimbledon singles titles (Venus won 5 and Serena won 7).  By winning the 2001 Australian Open women's doubles title, they became the 5th pair to complete the Career Doubles Grand Slam and the only pair to complete the Career Doubles Golden Slam.  At the time, Venus and Serena were only 20 and 19 years old, respectively.  Since then they have gone on to add another two Olympic gold medals in the 2008 Beijing Olympics and the 2012 London Olympics.  Nearly a decade later, the duo would go on to win 4 consecutive grand slam doubles titles from 2009 Wimbledon through 2010 Roland Garros, which would catapult them to co-No.  1 doubles players on 7 June 2010.  Two weeks later, on 21 June 2010, Serena would hold the No. 1 singles ranking and Venus would be right behind her at No. 2 in singles.  Their most recent grand slam doubles titles came at the 2012 Wimbledon & 2016 Wimbledon events.  They remain very close, often watching each other's matches in support, even after one of them has been knocked out of a tournament. Hana Mandlíková (born 19 February 1962) is a former professional tennis player from Czechoslovakia who later obtained Australian citizenship.  During her career, she won four Grand Slam singles titles: the 1980 Australian Open, 1981 French Open, 1985 US Open, and the 1987 Australian Open.  She was also the runner-up at four Grand Slam singles events, including the Wimbledon finals of 1981 and 1986, and won one Grand Slam women's doubles title, the 1989 US Open with Martina Navratilova. Chris Evert won eighteen grand slam singles tournaments in her career (two Australian Open's, seven French Open's, three Wimbledon Championships', and six US Opens), and was runner-up in sixteen other finals ( giving her 34 finals appearances).  Evert competed in 56 Grand Slam singles tournaments, reaching the semi-finals or better in 52 of them.  Evert only lost twice in a grand slam tournament before the quarterfinal round, losing at the 3rd round stage at Wimbledon in 1983 and the French Open in 1988. Carlos Fernandes (1936-) is a retired Brazilian tennis player.  He had a good all-round game with excellent passing shots and moved fast around the court.  Fernandes had a reputation for being a charismatic ladies man.  He later became a coach.  He made his Grand Slam debut at Wimbledon 1957, losing in the opening round to Jorgen Ulrich.  At Roland Garros in 1958, Fernandes lost in round one to Pierre Darmon.  At Wimbledon he lost in round one to Butch Buchholz.  At 1959 French Open, Fernandes lost in round three to Jacques Brichant.At Wimbledon he lost in round two to Neale Fraser.  At French Open 1960, Fernandes lost in round three to Bobby Wilson and at Wimbledon lost in round two to Wolfgang Stuck.  At 1961 French Open, Fernandes achieved his best Grand Slam singles result by beating Pierre Darmon and Bob Hewitt before losing to Jan-Erik Lundquist in the quarter finals.  He lost in round two of Wimbledon to Wilson.  At Roland Garros 1962, Fernandes lost to Lundquist in round two.  At Wimbledon he lost in round one to Neale Fraser's brother John.  At 1963 French Open he lost in round one to Christian Duxin.  In round one of Wimbledon he led a young Arthur Ashe by two sets to 0, but lost in five sets.  At Wimbledon 1964 he lost in round two to Gene Scott.  An ankle injury in 1964 took its' toll and Fernandes played less after that.  As Open tennis arrived, Fernandes was reaching the end of his career.  He lost in round one of 1968 French Open to Bernard Montrenaud.  At Wimbledon he lost in round one to Mike Sangster. 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. The 2017 Australian Open Men's Singles final was the championship tennis match of the Men's Singles tournament at the 2017 Australian Open.  It was contested between Roger Federer and Rafael Nadal, ranked 17th and 9th in the world respectively.  It was their record ninth meeting in a Grand Slam final in their rivalry, and their 1st meeting in a Grand Slam final since the 2011 French Open.  In a rematch of the 2009 Australian Open final, which Nadal won in 5 sets, Roger Federer won the duel in 5 sets, beating Nadal for the first time in a Grand Slam since the 2007 Wimbledon final.  He also trailed Nadal 3–1 in the final set but won 5 games in a row to win the title.  This ended a 6-match losing streak against Nadal in Grand Slam events.  Having lost all of their previous three encounters, this was the first time Federer defeated Nadal at the Australian Open and also marked Federer's first Grand Slam victory over Nadal outside the grass courts of Wimbledon.  Federer extended his record of Grand Slam men's singles titles to 18, marking the third time he broke his own all-time record, after breaking the previous record of 14, held by Pete Sampras.
Answer: Hana Mandlíková