Question: Which tennis player, Kevin Ullyett or Jonathan Marray, competed on the singles tour, reaching world no. 215 in April 2005, but was unable to continue his singles career, in part due to injuries?
Context: 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. Thomas Mario Haas (] ; born 3 April 1978) is a German professional tennis player.  He has competed on the ATP Tour since 1996.  After breaking into the world top 100 in 1997, and reaching a career-high singles ranking of World No. 2 in May 2002, Haas's career was interrupted by injuries: he has twice dropped out of the world rankings due to being unable to play for twelve months.  His first period of injury saw him miss the whole of the 2003 season, and he did not return to the world's top 10 until 2007.  He also missed over a year's tennis between February 2010 and June 2011, but has since returned to play on the tour.  He returned to World No. 11 in 2013 after reaching the quarterfinals at the French Open for the first time in his career. Meredith McGrath (born April 28, 1971) is a former professional tennis player.  She was born in Midland, Michigan, USA and made her debut on the Women's Tennis Association tour in 1988.  In her eight-year professional career Meredith achieved career-high world rankings of #18 in singles and #4 in doubles.  She notched victories over such players as Martina Navratilova, Martina Hingis, Anna Kournikova, Jana Novotna, Arantxa Sanchez Vicario, and Gigi Fernandez.  The pinnacle of her career came in reaching the singles semi-finals and doubles finals at the 1996 Wimbledon Championships.  In the singles she defeated Mana Endo, Amanda Coetzer, Nancy Feber, Katarína Studeníková and Mary Joe Fernandez before losing to Arantxa Sánchez Vicario.  An injury the week prior to the 1996 Wimbledon Championships eventually ended her career.  Meredith won the 1995 U.S. Open Mixed Doubles Championship (she was runner-up in 1989) and was the runner-up in the 1994 Australian Open Doubles Championship.  Meredith won three WTA singles titles: Oklahoma City and Eastbourne in 1994 and Birmingham in 1996, 25 doubles titles.  She retired with a 140–83 record in singles and a 189–40 record in doubles.  Meredith was recognized by Tennis Magazine as the WTA Comeback Player of the Year as she overcame near career-ending injuries to having her most successful competitive season in 1996.  In 1994 she received the WTA Tour Comeback Player of the Year. Noppawan "Nok" Lertcheewakarn (Thai: นพวรรณ เลิศชีวกานต์ ; born 18 November 1991) is a Thai professional tennis player.  At Wimbledon 2009, she won the junior singles title.  Lertcheewakarn has a highest rank on the WTA singles tour of 149 and doubles tour of 97. Samantha Stosur and Scott Draper defeated Liezel Huber and Kevin Ullyett in the final 6–2, 2–6, 10–6 to win the mixed doubles title at the 2005 Australian Open tennis tournament. 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. Jonathan "Jonny" Marray (born 10 March 1981) is a British tennis player and a Wimbledon Men's Doubles champion.  Marray is a former top 20 doubles player, reaching a career high of world no. 15 in January 2013, mainly due to more regular appearances on the ATP World Tour, following his victory at Wimbledon 2012.  He has also competed on the singles tour, reaching world no. 215 in April 2005, but was unable to continue his singles career, in part due to injuries. Kevin Ullyett (born 23 May 1972 in Salisbury, now Harare) is a former professional tennis player from Zimbabwe.  His primary success on the tour was in men's doubles. Bob Bryan and Mike Bryan were the defending champions, but lost to wildcards Jonathan Marray and Frederik Nielsen in the semifinals.  Marray and Nielsen won the title defeating fifth seeded Robert Lindstedt and Horia Tecău who competed in their third consecutive Wimbledon final.  Marray became the first British player to win the men's doubles at Wimbledon since Pat Hughes and Raymond Tuckey in 1936.  Nielsen is only the second Danish winner of a Grand Slam title, following his own grandfather, Kurt Nielsen, who won the mixed doubles at the 1957 U.S. National Championships. The Wimbledon effect (Japanese: ウィンブルドン現象, rōmaji: "Uinburudon Genshō", literally "Wimbledon Phenomenon") is a chiefly British and Japanese analogy (which possibly originated in Japan) which compares the tennis fame of the Wimbledon Championships, held at the All England Lawn Tennis and Croquet Club in Wimbledon, London, with the economic success of the United Kingdom's financial services industries – especially those clustered in the City of London.  The point of the analogy is that a national and international institution (the All England Club) can be highly successful despite the lack of strong native competition, as in modern tennis Britain has produced very few Wimbledon champions, with only Ann Haydon Jones, Virginia Wade (both women's singles), Jonathan Marray (men's doubles), Andy Murray (men's singles), John Lloyd, Jeremy Bates, Jo Durie, Jamie Murray and Heather Watson (mixed doubles) winning titles in the Open Era.
Answer: Jonathan "Jonny" Marray