Van Nistelrooy has also gained valuable experience as Assistant Coach for the Netherlands national team under Guus Hiddink.
Ruud van Nistelrooy said he was sad to see Erik ten Hag fired by Manchester United on Monday, but the club's former striker is honoured to step in as interim manager for as long as required.
Manchester United have appointed their former striker Ruud van Nistelrooy as an assistant to manager Erik ten Hag
The 27-year-old international will need little motivating for Saturday's FA Cup final against first division underdogs Millwall.
Manchester United striker Ruud van Nistelrooy had a chance to thank knee surgeon Richard Steadman who saved his career.
Ruud van Nistelrooy has retired from international football, the Dutch Football Association said in a statement.
Netherlands coach Bert van Marwijk omitted Hamburg SV striker Ruud van Nistelrooy from his provisional 30-men squad for the World Cup on Tuesday.
Hamburg SV have signed Dutch striker Ruud van Nistelrooy from Real Madrid on an 18-month contract, the Bundesliga club said on Saturday.
"You can absolutely guarantee that we're not going to give Ruud away," Ferguson was quoted as saying on United's official Web site.
Ruud van Nistelrooy's hopes of a dramatic return to the international fold at the World Cup look slimmer after the former Manchester United and Real Madrid striker was left out of a Dutch training squad named on Monday. Coach Bert van Marwijk, who names his provisional squad on May 11, omitted Van Nistelrooy from a 26-man training camp assembling next Monday.
Manchester United manager Alex Ferguson said he sold the striker to Real Madrid because the Dutchman could not deal with being dropped.
The Dutch striker scored twice in a 3-2 triumph at Fulham.
Van Nistelrooy has to admit or deny the charges by Tuesday, with the case due to be heard on Thursday.
The Manchester United striker will undergo a scan on Friday as concern over his calf injury deepens.
Spanish media reported that Real Madrid have bid 15 million euros for the Manchester United striker.
Real Madrid striker Ruud van Nistelrooy made his first appearance for the club on Monday since he was sidelined with a serious knee injury in November and underwent surgery.
The Dutch striker gave Manchester United a 4-1 premier league win at Leicester City.
Ruud van Nistelrooy struck twice in six minutes to salvage a 2-2 draw for Manchester United against Olympique Lyon.
Bayern Munich president Franz Beckenbauer said on Monday the Bundesliga champions had a good chance of signing Netherlands striker Ruud van Nistelrooy.
Ruud van Nistelrooy struck from close range in injury time to earn the Netherlands a hard-fought 1-0 win over Albania in their Euro 2008 qualifier on Wednesday.
Leicester City part ways with head coach Van Nistelrooy after Premier League relegation
The Dutchman said he accepted responsibility for the incident but added that he had not intended to hurt Ashley Cole.
The scorers' list after the conclusion of the group league stage at the Euro 2004 football championship.
Ruud van Nistelrooy left Old Trafford before his side's Premier League game against Charlton Athletic
The Dutch striker will join Real Madrid from Manchester United on a three-year contract, the Primera Liga club said.
'There may be some interest from Real Madrid and Bayern Munich,' Manchester United manager Alex Ferguson said.
Ruud van Nistelrooy's place in the Dutch World Cup squad is not in doubt, according to coach Marco van Basten.
Nistelrooy's form has without question been the deciding factor, said the Man U manager.
The frustrated Dutch striker said Swedish referee Anders Frisk ruled everything in favour of Portugal.
The Netherlands consolidated their position at the top of Group One with a 4-0 World Cup qualifying rout of Andorra.
Vardy will leave Leicester at the end of the season, with the 38-year-old former England international set to play his final game for the club
Netherlands coach Bert van Marwijk has ruled striker Ruud van Nistelrooy out of this year's European championships, the Dutch newspaper Algemeen Dagblad reported on Friday.
The ace strikers will be the preferred summer signings, Real Madrid coach Carlos Queiroz said.
The ace striker's second half goal enabled the Netherlands settle for a 1-1 draw in their opening match in Group D.