Question: Who is the tallest-ever world tennis number 1, Marat Safin or Melanie Oudin?

full_context: Document 1: Marat Safin: Marat Mubinovich Safin (Russian: Мара́т Муби́нович Са́фин ; ] , Tatar: Марат Мөбин улы Сафин "Marat Möbin uğlı Safin" ; born 27 January 1980) is a Russian politician and retired professional tennis player. He achieved the Association of Tennis Professionals (ATP) world No. 1 singles ranking on November 20, 2000. Nobody taller than Safin has ever reached his world number-one ranking. Safin is the older brother of former world No. 1 WTA player, Dinara Safina. They are the first and only brother–sister tandem in tennis history who have both achieved No. 1 rankings. On court, Safin was famous for his emotional outbursts and sometimes fiery temper.
Document 2: Jack Sock: Jack Sock (born September 24, 1992) is an American professional tennis player who is currently ranked world No. 21 in men's singles by the Association of Tennis Professionals (ATP). He is one of the top ranked American men in both singles and doubles on the ATP Tour. A former junior US Open champion, Sock's singles success is highlighted by 7 ATP finals, including three titles. His career best result came at the 2017 Indian Wells Masters, where he reached the semi-finals.
Document 3: Yevgeny Kafelnikov: 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.
Document 4: 2012 US Open – Men's Doubles: Jürgen Melzer and Philipp Petzschner were the defending champions, but lost in the second round to Jamie Delgado and Ken Skupski. Melzer and Petzschner needed a wildcard to compete because they forgot to sign up.<br>
Document 5: Tatiana Golovin: Tatiana Golovin (Russian: Татья́на Григорьевна Голови́на , "Tatyana Grigoryevna Golovina" ; born 25 January 1988) is a Russian-born French retired professional tennis player. She won the 2004 French Open mixed doubles event with Richard Gasquet, and reached the singles quarterfinal at the 2006 US Open, losing to the eventual champion Maria Sharapova. Her highest singles ranking to date is 12. In 2008, she was diagnosed with lower back inflammation and was forced to stop playing competitive tennis indefinitely.
Document 6: Yevgeny Kafelnikov: 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.
Document 7: Maria Sharapova: Maria Yuryevna Sharapova (Russian: Мари́я Ю́рьевна Шара́пова ; ] ; born April 19, 1987) is a Russian professional tennis player. A United States resident since 1994, Sharapova has competed on the WTA tour since 2001. She has been ranked world No. 1 in singles by the WTA on five separate occasions, for a total of 21 weeks. She is one of ten women, and the only Russian, to hold the career Grand Slam. She is also an Olympic medalist, having earned silver for Russia in women's singles at the 2012 Summer Olympics in London.
Document 8: Melanie Oudin: Melanie Oudin (born September 23, 1991) is a former American tennis player and former world junior No. 2. She was a member of the American Fed Cup team from 2009 to 2011 and winner of the 2011 US Open mixed doubles title, with fellow American player Jack Sock.
Document 9: Zina Garrison: Zina Lynna Garrison (born November 16, 1963) is a former professional tennis player from the United States. During her career, she was a women's singles runner-up at Wimbledon in 1990, a three-time Grand Slam mixed doubles champion, and a women's doubles gold medalist and singles bronze medalist at the 1988 Olympic Games. She is currently coaching Taylor Townsend.
Document 10: Hicham Arazi: Hicham Arazi (Arabic: هشام أرازي‎ ‎ ; born 19 October 1973) is a former male tennis player from Morocco. He played professionally from 1993 to the end of 2007. The left-hander reached his career-high ATP Tour singles ranking of world No. 22 on November 5, 2001. During his career, Arazi captured one singles title, in Casablanca. "The Moroccan Magician" reached the quarter-finals of the Australian Open twice and the French Open twice. As well as the aforementioned nickname, some tennis analysts called him "The Moroccan McEnroe" due to his talent - he played with incredible touch, and often enjoyed the support of the crowd even when not at home. He led Patrick Rafter, winner of the US Open in 1997 and 1998, two sets to love during the first round of the latter tournament. In the third set he was upset with several line calls, telling umpire Norm Chryst to "get out of here", which sparked the beginning of Arazi's meltdown (and Rafter's comeback). During his career, he notably gained victories over former World No. 1s and Grand Slam champions Roger Federer, Andre Agassi, Yevgeny Kafelnikov, Marat Safin, Lleyton Hewitt, Juan Carlos Ferrero, Carlos Moyá and Jim Courier.
Document 11: Gisela Dulko: Gisela Dulko (] ; born 30 January 1985, in Tigre) is a retired professional tennis player from Argentina. Although she enjoyed modest success in singles, reaching world no. 26 and winning four WTA Tour titles, her speciality was doubles, where she achieved a world no. 1 ranking. Partnering with Flavia Pennetta, Dulko won the 2010 WTA Tour Championships and the 2011 Australian Open in doubles. Dulko also reached the mixed doubles final at the 2011 US Open, with Edward Schwank. She is remembered for her ability to upset the big names on the tour, such as Maria Sharapova in the second round of Wimbledon in 2009; and Samantha Stosur in the third round of Roland Garros in 2011. She also beat Martina Navratilova in the second round of Wimbledon in 2004 in Navratilova's final Grand Slam singles match.
Document 12: 2013 US Open – Mixed Doubles: Ekaterina Makarova and Bruno Soares were the defending champions, but Makarova decided not to participate. Soares played with Anabel Medina Garrigues, but lost to Abigail Spears and Santiago González in the semifinals.<br>
Document 13: Dinara Safina career statistics: This is a list of the main career statistics of retired, Russian professional tennis player, Dinara Safina. Throughout her career, Safina won twelve WTA singles titles including three Tier I singles titles at the 2008 Qatar Telecom German Open, Rogers Cup and Toray Pan Pacific Open respectively; one Premier Mandatory singles title at the 2009 Mutua Madrileña Madrid Open and one Premier 5 singles title at the 2009 Internazionali BNL d'Italia. She was also the runner-up at the 2008 French Open and the 2009 Australian Open and French Open as well as a silver medalist in singles at the 2008 Beijing Olympics.
Document 14: 2012 US Open – Mixed Doubles: Melanie Oudin and Jack Sock were the defending champions but lost to Sania Mirza and Colin Fleming in the second round. <br> Kim Clijsters played her last professional match, in any format, losing in the second round with Bob Bryan to Ekaterina Makarova and Bruno Soares. Unseeded pair Makarova and Soares ended up winning the title after defeating fourth seeds Květa Peschke and Marcin Matkowski in the final 6–7, 6–1, [12–10].
Document 15: Mary Joe Fernández: Mary Joe Fernández Godsick (born María José Fernández; August 19, 1971) is an American former professional tennis player. She reached a career-high ranking of world No. 4 in both singles and doubles. Fernández was the runner-up in three Grand Slam singles tournaments and won two Grand Slam women's doubles titles and two Olympic gold medals.
ground_truth: Marat Mubinovich Safin