Question: Who is the tallest-ever world tennis number 1, Marat Safin or Melanie Oudin?
Context: Roger Federer defeated Marat Safin 7–6, 6–4, 6–2 in the final to win the Men's Singles title at the 2004 Australian Open tennis tournament.  This victory allowed Federer to become world number one the following week for the first time in his career, and he would hold that ranking for a record 237 consecutive weeks. 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. The Masters Guinot-Mary Cohr is a tennis team exhibition event played on clay the week before the French Open.  It features two teams, Guinot (Red) and Mary Cohr (Green).  Both are made up of five players and 1 playing captain.  The captains have been Marat Safin, James Blake, David Ferrer, and Michaël Llodra.  Team Guinot currently hold a 2-1 series lead over team Mary Cohr, with the most recent tie (2012) being won by team Mary Cohr.  Each match is played best-of-three sets, with a match tiebreak in place of a third set. Marat Safin and Dmitry Tursunov were the defending champions.  They were both present but did not compete together.  Safin partnered with Teymuraz Gabashvili, but lost in the first round to Stephen Huss and Ross Hutchins.  Tursunov partnered with Igor Kunitsyn, but they were forced to withdraw due to a shoulder injury for Tursunov before their quarterfinals match against Sergiy Stakhovsky and Potito Starace. 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. Tim Henman was the defending champion but he lost in the third round to Mikhail Youzhny.  Marat Safin won the title for the then record 3rd time, defeating Radek Štěpánek in the final in straight sets.  Safin thus became the first man to win the two final Masters events back-to-back, having won the Madrid Masters the week before. 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. The 2004 Paris Masters (also known as the "BNP Paribas Masters" for sponsorship reasons) was a men's tennis tournament held at the Palais omnisports de Paris-Bercy in Paris, France and played on indoor carpet courts.  It was the 33rd edition of the Paris Masters, and was part of the 2004 ATP Masters Series.  The tournament was held from 1 November to 8 November 2004.  Russia's Marat Safin defeated Czech Radek Štěpánek in the final to win the singles title. The Boodles Tennis Challenge (former Boodle and Dunthorne Champions Challenge) is an international five-day tennis exhibition held at Stoke Park in Buckinghamshire, England.  In coordination with Boodles, a luxury jeweler, it was initially founded by veteran sports agent Patricio Apey as an event to help players hone their grass court skills in the lead-up to Wimbledon.  It is played in a similar style to the AAMI Classic giving the players at least three matches each and allowing non competition players to appear in one match per a day.  Over recent years Andre Agassi, Pete Sampras, Tim Henman, Marat Safin, James Blake, Andy Roddick, Fernando González, David Nalbandian, Novak Djokovic, Fernando Verdasco, Jo-Wilfried Tsonga and Andy Murray have all appeared.  Since its inception, The Boodles has turned into a lifestyle event featuring British luxury brands such as Boodles, Veuve Clicquot and H.R. Owen. Janko Tipsarević (, ] ; born 22 June 1984) is a Serbian professional tennis player.  His career-high singles ranking is world No. 8, achieved on 2 April 2012.  In his career, he has won four ATP World Tour titles, one ATP doubles title, three Futures, and 15 Challenger titles.  Tipsarević also won the 2001 Australian Open Junior title.  Tipsarević has achieved two victories over a World No. 1 player, having defeated compatriot Novak Djokovic twice.  He also has thirteen victories against other players in the top 10: four wins against Tomáš Berdych, and one each against Fernando González, Mikhail Youzhny, David Ferrer, James Blake, Gaël Monfils, Andy Murray and Juan Mónaco.  He holds victories over former World No. 1 players Carlos Moyá, Marat Safin, Lleyton Hewitt, Juan Carlos Ferrero and Andy Roddick.  His best results at a Grand Slam have been reaching the quarterfinals at the US Open in 2011 and 2012.  He is only the second Serb to reach the final 16 at all four different grand slams.
Answer: Marat Mubinovich Safin