Question: Which tennis player won more Grand Slam titles, Henri Leconte or Jonathan Stark?

full_context: Document 1: Ken Flach: Kenneth Eliot Flach (born May 24, 1963) is a former professional tennis player from the United States. A doubles specialist, he won 4 Grand Slam men's doubles titles (2 Wimbledon and 2 US Open), and 2 Grand Slam mixed doubles titles (1 Wimbledon and 1 French Open). He also won the men's doubles Gold Medal at the 1988 Olympic Games in Seoul, partnering Robert Seguso. Flach reached the World No. 1 doubles ranking in 1985.
Document 2: 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 3: Henri Kontinen: Henri Kontinen (] ; born 19 June 1990) is a Finnish tennis player.
Document 4: Henri Leconte: Henri Leconte (born 4 July 1963) is a former French professional tennis player. He reached the men's singles final at the French Open in 1988, won the French Open men's doubles title in 1984, and helped France win the Davis Cup in 1991. Leconte's career-high singles ranking was world No. 5.
Document 5: 1997 Stockholm Open – Doubles: Patrick Galbraith and Jonathan Stark were the defending champions, but Stark did not participate this year. Galbraith partnered Ellis Ferreira, losing in the final.
Document 6: Jonathan Stark (tennis): Jonathan Stark (born April 3, 1971) is a former professional tennis player from the United States. During his career he won two Grand Slam doubles titles (the 1994 French Open Men's Doubles and the 1995 Wimbledon Championships Mixed Doubles). Stark reached the World No. 1 doubles ranking in 1994.
Document 7: 1996 Comcast U.S. Indoor – Doubles: Jim Grabb and Jonathan Stark were the defending champions but only Grabb competed that year with Richey Reneberg.
Document 8: 1986 Grand Prix German Open: The 1986 German Open (also known as the 1986 Ebel German Open) was a men's tennis tournament of the 1986 Nabisco Grand Prix and played on outdoor red clay courts. It was the 77th edition of the event. It took place at the Am Rothenbaum in Hamburg, West Germany, from 15 September through 21 September 1986. Henri Leconte won the singles title. Fourth-seeded Henri Leconte won the singles title.
Document 9: 1984 French Open – Men's Doubles: The Men's Doubles tournament at the 1984 French Open was held from 26 May until 10 June 1984 on the outdoor clay courts at the Stade Roland Garros in Paris, France. Henri Leconte and Yannick Noah won the title, defeating Pavel Složil and Tomáš Šmíd in the final.
Document 10: Pierre-Hugues Herbert: Pierre-Hugues Herbert (] ; born 18 March 1991) is a French professional tennis player. In doubles, he won the title at the 2015 US Open and 2016 Wimbledon as well as several Masters 1000 tournaments along with Nicolas Mahut. In singles he has reached one ATP career final (at the 2015 Winston-Salem Open), and achieved his career high singles ranking of World No. 64 on 14 August 2017.
Document 11: Rick Leach: Rick Leach (born December 28, 1964) is a former professional tennis player and a coach from the United States. A doubles specialist, he won five Grand Slam men's doubles titles (three Australian Open, one Wimbledon, one US Open), and four Grand Slam mixed doubles titles (two Australian Open, one Wimbledon, one US Open). Leach reached the World No. 1 doubles ranking in 1990.
Document 12: Jim Courier: James Spencer Courier Jr. (born August 17, 1970) is an American former World No. 1 professional tennis player. During his career, he won four Grand Slam singles titles, two at the French Open and two at the Australian Open. He holds the record for being the youngest man to have reached the finals of all four Grand Slam singles tournaments, at the age of 22 years and 11 months. He also won five Masters 1000 series titles. Until Novak Djokovic in 2016, Courier was the last man to win both the Australian and French Opens in the same calendar year.
Document 13: Arnaud Clément: Arnaud Clément (born 17 December 1977) is a retired professional tennis player and the current captain of the France Davis Cup team. He reached the final of the 2001 Australian Open and achieved a career-high ranking of World No. 10 in April the same year.
Document 14: Julien Benneteau: Julien Benneteau (] ; born 20 December 1981) is a French professional tennis player. His career-high singles ranking is ATP world no. 25, which he reached in November 2014. He formerly resided in Boulogne-Billancourt and now lives in Geneva. Benneteau is generally regarded as one of the best singles players on the tour who has not won a title, finishing as runner-up in ten ATP tournaments. He reached the quarterfinals of the 2006 French Open and the semifinals of the 2014 Cincinnati Masters.
Document 15: 2002 TD Waterhouse Cup – Doubles: At the 2002 TD Waterhouse Cup – Doubles, Jonathan Stark and Kevin Ullyett were the defending champions but only Ullyett competed that year with Robbie Koenig.
ground_truth: Jonathan Stark