Former first-team coach Rene Meulensteen believes David Moyes' decision to overhaul Manchester United's backroom staff engineered his downfall.
Moyes' 10-month reign as manager came to an end on Tuesday after United's hierarchy decided to sack him after a disastrous Premier League campaign, which has left the club languishing in seventh position.
The final straw proved to be Sunday's 2-0 defeat at Everton, a result that crushed United's hopes of qualifying for next season's UEFA Champions League, with fourth-placed Arsenal 13 points clear with four matches remaining.
Upon his arrival at Old Trafford, Moyes disposed of Meulensteen, assistant Mike Phelan and goalkeeping coach Eric Steele.
The Scot replaced the trio with assistant Steve Round, first-team coach Jimmy Lumsden and goalkeeping coach Chris Woods, while former United defender Phil Neville arrived as a coach.
And Moyes' decision to change United's winning backroom staff despite warnings not to, cost the former Everton head coach his job, according to Meulensteen.
"David ignored the solid advice given to him by many of the staff in place at the time and opted to put his own plans in place, which he’s entitled to do but it backfired on him a little bit," Meulensteen told US radio station SiriusXM.
"I always strongly believe that performances and results are a reflection of what is happening behind the doors. That wasn't good enough.
"Don't forget that Moyes was a respected manager over 11 years at Everton, but I tried to warn him: 'You do realise that, with all respect to Everton, you're going from a yacht to a cruise liner, and that’s how big the difference will be?'
"It's everything that surrounds the club – the players, the pressure, the performances. I think he’s underestimated that and unfortunately it's cost him his position."
Meulensteen, who went on to manage Russian outfit Anzhi Makhachkala and Fulham following his departure from Manchester, is stunned by the speed of United's decline.
The fallen Premier League giants are 23 points adrift of leaders Liverpool, while they will be absent from the Champions League for the first time in 19 years.
"It's really too crazy for words that we are talking about this," the 50-year-old said.
"I've been part of the United backroom staff under Ferguson in the last five years that has proven to be the most successful period in the club's history.
"To now have a really poor season, dropping to seventh in the league table, out of the Champions League suddenly after so many years of constant success, that’s probably why the decision has been made.
"Even before Moyes had the job, I still think United had a fantastic squad with fantastic players."
|Wolfsburg plan Malanda tribute|
|Blanc: Ibrahimovic, Cavani need to improve partnership|
|NBA´s Kings invest in Sacramento Republic|
|Djukic slams Ronaldo as ´ugly and conceited´|
|Marcelino hails Villarreal´s historic achievement|
|Destro: I want to show Milan are great|
|Copa del Rey Review: Aduriz breaks drought to send Bilbao through|
|Blaszczykowski to miss Leverkusen clash|
|Villarreal swoop for Bailly|
|CAF to consider alternatives to drawing lots|
|Ginola ´not giving up´ on FIFA presidency bid|
|Eto´o backs Sampdoria´s European dream|
|Chelsea v Manchester City: Doubts over Costa and Fabregas for title showdown|
|Sunderland v Burnley: Poyet calls for change in mentality|
|Serie A Preview: Crisis clubs meet as Parma head to Milan|
|West Brom v Tottenham: Pulis excited by McManaman arrival|
|Ginola campaign cancels crowdfunding page|
|Stoke City v QPR: Hughes hopeful of Diouf boost|
|Manchester United v Leicester City: Pearson has no time for fond memories|
|Thai consortium completes Wednesday purchase|
|Wigan exodus continues as Ramos joins Levante|
|Crystal Palace v Everton: Martinez hoping to reap Qatar training rewards|
|Liverpool v West Ham: Allardyce backs Carroll to shine on Anfield return|
|Strootman injury ´nothing serious´|
|Pearson backs Kramaric to adapt quickly|
|Hull City v Newcastle United: Carver calls for repeat KC Stadium rout|
|Rodgers not expecting immediate Sturridge impact|
|Palace land free agent Ameobi|
|Guinea progress past Mali in drawing of lots|
|Strootman requires surgery|
|Mathieu reveals details of Luis Enrique-Messi bust-up|
|New Inter signing Brozovic wants to be the next Frank Lampard|
|Bayer Leverkusen v Borussia Dortmund: Visitors aim for fresh start|
|Eibar v Atletico Madrid: Capa up for a fight|
|Whelan and Crouch sign new Stoke deals|
|Mutch joins Palace from QPR|
|Eriksen delighted by League Cup double|
|Real Madrid v Real Sociedad: Moyes´ men out for rare Real double|
|Nolan impressed by Carroll attitude|
|Wenger: Gabriel will adapt to English football|
|Destro says yes to Milan move|
|Allardyce not expecting Sakho ban|
|Ribery sidelined for three Bayern Munich matches|
|Cahill refuses to rule out retirement after Asian Cup final|
|Pogba to leave Juve by end of next season - Agent|
|Martinez not planning Eto´o replacement|
|Blatter formally submits bid to remain FIFA president|
|Puncheon predicts ´great times´ for Palace|
|Donadoni has no plans to leave Parma and criticises Cassano|
|Mangala: My first season at City could have been better|
|UAE v Iraq: Rare podium finish on offer|
|Ryan spurred on by Australia´s 2011 heartbreak|
|Montella will not sell Cuadrado cheap|
|Mali, Guinea furious with tie-breaking procedure|
|Luis Enrique defends Neymar´s behaviour|
|Gabi: Referee lacked personality|
|Chile 3 USA 2: Gonzalez´s brace extends Americans´ pain|
|Franjic cleared of serious injury|
|Our progression was deserved - Pochettino|
|Ivory Coast´s tournament starts now - Renard|
|Allegri rejects Juve criticism|
|Atletico´s Arda Turan escapes red card after throwing boot at assistant referee|
|Atletico Madrid 2 Barcelona 3 (agg 2-4): Neymar double secures semi-final spot|
|Parma 0 Juventus 1: Morata late show wins it for visitors|
|Sheffield United 2 Tottenham 2 (agg 2-3): Pochettino books Wembley final|
|Ecuador dismiss Vizuete|
|Championship Preview: Middlesbrough out to continue run, Bournemouth seek response|
|Guinea 1 Mali 1: Lots to decide Group D runners-up|
|Cameroon 0 Ivory Coast 1: Gradel strike sends Renard´s men through|
|Lots to be drawn to decide AFCON qualifiers|
|Eredivisie Preview: De Boer warning for Ajax, leaders PSV host Willem II|
|Bundesliga Preview: Leaders Bayern and Wolfsburg kick off Ruckrunde|
|Howard boost for Everton|
|Ligue 1 Preview: Jardim plays down Monaco title hopes ahead of Lyon showdown|
|Costa charged by FA for alleged Can stamp|
|O´Keefe joins Cardiff|
|Dons teenager Alli in demand|
|Gabriel seals Arsenal switch|
|Wolfsburg v Bayern Munich: Guardiola eyes ´big step´ to Bundesliga title|
|Paris Saint-Germain v Rennes: Montanier seeks another upset in French capital|
|Martinez rules out panic buys|
|Gilardino targets Fiorentina goals|
|Milan agree Bocchetti loan|
|League Two Preview: Cambridge and Luton prepare to renew rivalries|
|Ronaldo hit with two-match ban|
|West Brom complete McManaman deal|
|Sullivan hits back in Sakho row|
|Richards: Cuadrado suited to Premier League|
|Figo to challenge for FIFA presidency|
|Inzaghi out to freshen up struggling Milan|
|Wigan agree a fee for Mckay|
|Carver eyes strong finish|
|Bowen cools talk of Stoke swoop for Sandro and Traore|
|Lazio-bound Morrison lands in Rome|
|Mourinho fined £25k for ´campaign´ claims|
|Mainz bring in Castillo|
|Villa: Lambert will not be sacked|
|Monk hopeful of adding new faces|
|Sainsbury ready to replace Franjic|
|Beckenbauer hopeful of Guardiola stay|
|Mourinho hits back at Costa critics|
|Rodriguez grateful for ´fundamental´ Ronaldo support|
|La Liga Preview: Real want revenge against Socieded|
|No Dallas move for Essien|
|Bale rubbishes United link, Ronaldo rift|
|Sahin in ´good shape´ for Bundesliga resumption|
|Rodgers slams Costa´s stamp collection|
|Under-fire Inzaghi urges patience|
|Rodgers: Courtois saved Chelsea|