Question: Mariana Kovacevic has treated the defensive midfielder for which Turkish club?

Context paragraphs:
Fernando (footballer, born 1987): Fernando Francisco Reges Mouta (born 25 July 1987), known simply as Fernando, is a Brazilian professional footballer who plays for Turkish club Galatasaray SK as a defensive midfielder.

Nigel de Jong: Nigel de Jong (] ; born 30 November 1984) is a Dutch professional footballer who plays as a defensive midfielder for Turkish club Galatasaray and the Netherlands national team.  He joined the Ajax youth academy as a youngster and worked his way through the ranks to make the first team at age 17.  Two years later, in 2004, he made his international debut.  Additionally, in 2010 he won a World Cup runners-up medal.

Landry N'Guémo: Landry Joel Tsafack N'Guémo (born 28 November 1985) is a Cameroonian footballer who plays as a defensive midfielder for Turkish club Kayserispor and the Cameroon national team.  He has previously played for Nancy, Bordeaux and Saint-Étienne in France and for Scottish club Celtic on loan.  He has played in Turkey since 2015, firstly with Akhisar Belediyespor before joining Kayserispor in 2017.  N'Guémo has played for the Cameroon national team since 2006, including at the 2010 and 2014 World Cups.

Pedro Franco: Pedro Camilo Franco Ulloa (born 23 April 1991) is a Colombian professional footballer who plays as a centre back for Turkish club Boluspor, on loan from Beşiktaş.  He is frequently used as a playmaker from the defensive end and also as a defensive midfielder if needed.  He is mostly known for his anticipation of the ball, ball technique and passing.

Mariana Kovacevic: Mariana Kovacevic is a Serbian traditional healer who has specialized in the use of horse placenta treatment to heal athletes.  During the duration of the 2012 African Cup of Nations in Gabon and Equatorial Guinea she used the horse placenta treatment to heal Ghana's Asamoah Gyan, who had been injured and was supposed to be off football for four weeks.  She is reported to have nursed him back to health in four hours.  She was also reportedly enlisted by the Serbia during the world of 2010 in south Africa.  Other footballers who are reported to have been treated by Mariana include Pablo Zabaleta, Vincent Kompany, Nigel de Jong and Robin Van Persie of Manchester United.  There has been some doubt as to whether Mariana's therapies work.  But more footballers are turning to her for help.

Daniel Dimov: Daniel Dimov (Bulgarian: Даниел Димов ; born 21 January 1989 in Dobrich) is a Bulgarian professional footballer who currently plays as a defensive midfielder and centre-back for Turkish club Manisaspor.

Carl Medjani: Carl Medjani (Arabic: كارل مجاني‎ ‎ ; born 15 May 1985) is an Algerian professional footballer who plays as a central defender or defensive midfielder for Turkish club Sivasspor.

Ryan Donk: Ryan Henk Donk (born 30 March 1986 in Amsterdam) is a Dutch professional footballer who plays as a defensive midfielder for Spanish club Real Betis on loan from Turkish club Galatasaray.  He can also play as a centre back.

Gary Medel: Gary Alexis Medel Soto (] ; born 3 August 1987) is a Chilean professional footballer who plays for Turkish club Beşiktaş as a defensive midfielder.  However, he can also play as a defender.  Due to his work-rate, physicality, tenacity, tactical intelligence, and his aggressive, hard-tackling style of play, as well as his leadership on the pitch, he is nicknamed the "Pitbull".

Salih Dursun: Salih Dursun (born 12 July 1991) is a Turkish footballer who plays as a right back and defensive midfielder for Turkish club Antalyaspor on loan from Galatasaray in Süper Lig.  He made his Süper Lig debut on 27 August 2012.  Though he wasn't a particularly well-known player until 21 February 2016, he gained fame on that date after he showed the red card to referee Deniz Ateş Bitnel in an effort to protest the dismissal of his teammate Luis Pedro Cavanda in a match against Galatasaray.  He himself was sent off following the act.  While his extreme reaction received mixed feedback from the media and football fans alike, it was highly appreciated in the city of Trabzon, to the extent of having a street renamed after him.

Supporting paragraphs: Mariana Kovacevic Nigel de Jong
Answer: Galatasaray