Question: Battle of the Buffet contained a studs-up challenge by which retired Dutch footballer?
Context: The "Battle of the Buffet" is a name used by the British press to refer to a Premier League match played between Manchester United and Arsenal at Old Trafford, Manchester, on 24 October 2004.  The match saw a series of unprofessional fouls that were overlooked by referee Mike Riley, such as Rio Ferdinand on Fredrik Ljungberg in the 19th minute and striker Ruud van Nistelrooy's studs-up challenge on Ashley Cole.  Arsenal dictated much of the early play and created several openings, but as the game progressed Manchester United threatened.  The home team were awarded a controversial penalty in the 73rd minute, as Wayne Rooney tumbled over Sol Campbell's outstretched leg.  Van Nistelrooy converted the penalty kick and late in the game Rooney scored for 2–0.  The result ended Arsenal's record-breaking 49-match unbeaten run. Peter Martin Hoekstra (] ; born 4 April 1973) is a retired Dutch footballer who played as a winger for PSV Eindhoven, Ajax and Stoke City.  Capped 5 times by the Dutch national team, he was a member of the Dutch squad at Euro 1996 in England under manager Guus Hiddink. Joost Gerardus Bernard Volmer (born 7 March 1974), simply known as Joost Volmer, is a retired Dutch footballer.  Volmer played for various club teams in the Netherlands, and played once abroad, for West Bromwich Albion.  He retired from professional football in November 2009, then playing for De Graafschap, after stating that he could not give a 100% anymore. Joop Böckling (born 3 November 1955, in Amsterdam) is a retired Dutch footballer who played as a forward. Johannes Hildebrand "John" de Wolf (born 10 December 1962 in Schiedam) is a retired Dutch footballer, who played as a defender.  He earned six caps for the Dutch national team, scoring two goals. Dirk Kuyt (Dutch: Dirk Kuijt; ] ; born 22 July 1980) is a retired Dutch footballer who most recently played for Feyenoord.  Originally starting his career as a striker, he played much of his career as a winger, and has also been deployed as a wingback. Cornelis Ignatius Maria (Keje) Molenaar (born 29 September 1958 in Volendam) is a retired Dutch footballer who was active as a defender.  Molenaar made his professional debut at FC Volendam and also played for Ajax Amsterdam, Feyenoord Rotterdam and SVV.  He currently works as a lawyer for Dutch law firm 'Brada Abeln' Brada Abeln was established in May 2011 after a merger of the renowned law firms of Brada Kuttner and Molenaar Abeln.  They have branches in Amsterdam, New York, Tel Aviv, Geneva and Düsseldorf. Michael John Reiziger (] , born 3 May 1973) is the current manager of Dutch Eerste Divisie side Jong Ajax, the reserves' team of AFC Ajax.  He is a retired Dutch footballer who played mainly as a right back. Robert "Rob" Reekers (born 7 May 1966) is a retired Dutch footballer who played in the Netherlands for FC Twente and in Germany for ASC Schöppingen, VfL Bochum and FC Gütersloh.  He earned four caps for the Dutch national side between 1988 and 1989.  After retiring as a player in 2000, Reekers has managed Rot-Weiß Oberhausen, FC Gütersloh and SuS Stadtlohn. Rutgerus Johannes Martinus "Ruud" van Nistelrooy (Dutch: "Ruud van Nistelrooij" ; ] ; born 1 July 1976) is a retired Dutch footballer and a current manager for the PSV youth team.  A former striker, he is the fourth-highest goalscorer in UEFA Champions League history with 56 goals.  He is a three-time Champions League top scorer, as well as a top scorer in three different European domestic leagues.
Answer: Rutgerus Johannes Martinus "Ruud" van Nistelrooy