To go to Old Trafford in the FA Cup and win is hard enough, but try doing it after an injury to your goalkeeper has forced your best player to go in goal instead.
Yet that is exactly what Tottenham Hotspur achieved in January 1980 when an early injury to Milija Aleksic forced Glenn Hoddle to don the gloves in a third-round replay.
Manchester United's big Scottish striker Joe Jordan had - unintentionally - broken Aleksic's jaw but he did not hold back in any aerial battles with Hoddle.
The elbows were flying but Hoddle stood firm and, remarkably, it was Tottenham who progressed through Ossie Ardiles's extra-time goal.
Sadly, for both teams, Liverpool proved their undoing that season - knocking Spurs out of the Cup in the sixth-round and pipping United to the title.
The two sides meet again in Manchester on Sunday in a mouth-watering fourth-round tie which will be live on BBC ONE from 1340 GMT.
Here BBC Sport finds out what happened to Gary Bailey, John Pratt, Aleksic and the rest of the players who lined up 27 years ago.
Manager - Dave Sexton Successful with Chelsea and QPR but sacked after failing to win a trophy in four years at United from 1977-81. Sexton went on to guide England to the Under-21 European Championships title in 1982 and 1984 before becoming the FA's first technical director. He also worked under three England managers - assisting Bobby Robson, coaching under Terry Venables and, most recently, heading up Sven-Goran Eriksson's player-scouting network. Sexton was awarded the OBE in 2005 for services to football.
Gary Bailey Ipswich-born but South African-bred keeper who won the FA Cup with United in 1983 and 1985 and also completed a BSc in physics while in Manchester. After a knee injury ended his career in England in 1987 he returned to South Africa to play for Kaizer Chiefs and study civil engineering but, after an investment in Mabula Game Reserve went wrong, he went to Oxford to get an MBA from Henley College. Now works as a TV presenter and motivational speaker and was an ambassador for South Africa's successful bid for the 2010 World Cup.
Jimmy Nicholl Canadian-born Northern Ireland right-back who played at two World Cup finals. Nicholl has twice been overlooked as NI manager, failing to agree terms in 1994 and 2004. Now assistant boss at Aberdeen, one of his most memorable moments as a manager came when he took Raith Rovers to Bayern Munich in a Uefa Cup tie and led the German giants 1-0 at the Olympic Stadium at half-time, before eventually losing the game 2-1 and 4-1 on aggregate.
Raith Rovers famously led Bayern Munich in the Uefa Cup
Stewart Houston Houston became George Graham's assistant at Arsenal in 1990 and, when Graham was sacked, Houston guided the Gunners to the 1995 Uefa Cup final, losing to Nayim's lob. Stayed on as Bruce Rioch's number two and, when Rioch left a year later, became caretaker manager again ahead of Arsene Wenger's appointment before leaving for an ill-fated spell in charge of QPR - with Rioch as his assistant. Linked up again with Graham at Tottenham but has been out of football since a brief spell with Walsall in 2002.
Sammy McIlroy The last United player signed by Sir Matt Busby, McIlroy also went to two World Cups with Northern Ireland and managed his country from 2000 to 2003. Took Macclesfield into the Football League in 1997 and repeated the trick with Morecambe in 2007.
Gordon McQueen Schoolboy goalkeeper who became an imposing centre-half. Known for his brilliance in the air, McQueen suffered the wrath of Leeds fans when he left to join United in 1978 but stayed at Old Trafford until 1985 before winding down his career in Hong Kong. McQueen, who managed Airdrie and St Mirren, and coached at Middlesbrough, is now a TV pundit and newspaper columnist.
Martin Buchan Canny Scot who organised United's defence. Stayed at Old Trafford until 1984 when he had brief spells playing for Oldham and managing Burnley. Worked in sales and promotions for Puma before taking a job advising players for the Professional Footballers Association.
Son Jamie, a former Scotland Under-21 international, plays for Scottish Second Division side Peterhead.
Steve Coppell Turned down Liverpool to play for Tranmere as a teenager so he could complete a degree in economic history at Liverpool University, where he also coached the football team. Joined United in 1975 but his playing career was cut short by a knee injury he picked up playing for England and he embarked on his management career with Crystal Palace. Now in charge of Reading.
Ray Wilkins Skilful midfielder who went on to manage QPR and Fulham, and coach Chelsea, Watford and Millwall. He did the voice-over for the famous Tango advert of the early 1990s and was assistant boss of the England Under-21 team until Peter Taylor quit in January 2007. Still a TV pundit.
Joe Jordan An aggressive - and toothless - target-man who played in three World Cups for Scotland and also terrorised defences with Leeds and AC Milan and Hellas Verona in Serie A. Managed Bristol City, Hearts and Stoke and is now first-team coach at Portsmouth.
Son Tom scored to help Blue Square South side Havant & Waterlooville beat Swansea to set up a tie with Liverpool in round four of this year's competition but he may not play at Anfield because he has asked to join Eastleigh.
Lou Macari A skilful and energetic forward, Macari scored the winner for United in the 1977 Cup final. Had success in management with Swindon and Stoke as well as unhappy spells with Celtic, West Ham and Huddersfield - losing two legal battles for unfair dismissal from the Bhoys - and is now a TV pundit.
Sons Mike and Paul both played under him at Stoke, and Paul is still on the books of Unibond League side Alsager Town. Tragically, Lou's youngest son Jonathan committed suicide in 1999 following his release by Nottingham Forest.
Mickey Thomas Mochdre-born Welsh international who enjoyed a colourful career, including scoring a memorable winner for Wrexham against Arsenal in the Cup at the age of 37 in 1992. Thomas was jailed a year later for passing counterfeit money to Wrexham trainees. Now a pundit and also works in corporate hospitality.
On 9 January 1980
Pink Floyd are at number one with 'Another Brick In The Wall'
US president Jimmy Carter authorises £765m in loans to bail out ailing automobile giant the Chrysler Corporation
The people of India vote Indira Gandhi back into power - less than three years after rejecting her "emergency dictatorship"
Son Aaron was Welsh ABA welterweight champion in 2004 and turned pro in 2006.
Son Chris, who began his career with Liverpool and won Republic of Ireland youth caps, later played for Leigh RMI and Chorley.
Paul McGrath Replaced Mickey Thomas
Worked as an apprentice sheet metal worker and security guard before his move to Old Trafford. He won the Cup with United in 1985 but alcohol and injury problems saw him leave in 1989. Despite his dodgy knees, McGrath played on until 1998 with Aston Villa, Derby and Sheffield United. His 2006 autobiography 'Back from the brink' detailed his drink problem and won the William Hill Irish Sports Book of the Year.
Manager - Keith Burkinshaw Tottenham's second most successful manager after Sir Bill Nicholson, Burkinshaw won two FA Cups and a Uefa Cup before leaving in 1984 after a disagreement with the board. He managed Bahrain for two years and scouted for two years at Swindon and West Brom under Ardiles before succeeding the Argentine as boss at the Hawthorns for a single season in 1993. Burkinshaw was director of football at Aberdeen from 1997 to 2000 and worked as Aidy Boothroyd's assistant at Watford until December 2007 before retiring at the age of 72 to spend more time at home because of a family illness.
Burkinshaw bought Villa and Ardiles after the 1978 World Cup
Nicknamed 'Elastic', Aleksic was born in Staffordshire to a Yugoslav father and as a youngster was released by Port Vale boss Sir Stanley Matthews, relaunching his career at Eastwood and winning the FA Trophy with Stafford. Spells at Plymouth and Luton followed before he signed for Spurs in 1979. Made just 32 appearances but played in both games as Tottenham beat Manchester City in the 1981 FA Cup final. He returned to Luton in 1982 before moving to South Africa to play for Wits University and he now works at the Golfer's Club in Johannesburg.
Chris HughtonStratford-born full-back who was the Republic of Ireland's first black international. Hughton joined on a part-time basis in 1977 because he wanted to complete his apprenticeship as a lift engineer. He played at White Hart Lane until 1990 and returned in 1993 to serve under 10 different managers as coach and assistant. He was also caretaker manager himself twice but left the club when Martin Jol was sacked in October 2007. Is now working in the media while looking for his own management job.
Son Cian is still at Spurs and is a Republic of Ireland Under-19 international.
Don McAllister Tough-tackling and energetic defender who could play in the centre of defence or left-back. Joined Charlton in 1981 and played for Tampa Bay Rowdies, Vitoria Setubal, Rochdale and Barnet before emigrating to Australia, where he lives in Sydney and works as a finance manager.
Terry Yorath Yorath left Spurs for Vancouver Whitecaps before joining Bradford and was injured during the Valley Parade fire disaster in 1985 when he had to jump out of a window after evacuating fans from a bar. As a manager, he took Wales to the brink of the 1994 World Cup finals and also lived in Beirut during a two-year spell in charge of Lebanon. Yorath stepped down as Huddersfield's assistant manager in December 2006.
Son Daniel had just signed for Leeds United when he sadly died, aged 15, of a heart defect in 1992. Daughter Gabby is a BBC Sport presenter.
Paul Miller Finished his playing career with Swansea and worked as an investment banker for Banque de Luxembourg. Miller has also spent time as players agent, property broker and with a law firm in London.
Steve Perryman Tottenham's record appearance holder, he has won more trophies than any other Spurs player. Returned as Ardiles's assistant and followed him to Japan before succeeding him as S-Pulse boss in 1999 and winning the J-League title. Currently director of football at Exeter City.
Ossie Ardiles Gifted midfielder whose desire to win the Cup was immortalised in Tottenham's 1981 Cup final song 'Ossie's Dream (Spurs are on their way to Wembley)'. Ardiles returned to the club as manager in 1993 but his reign, characterised by cavalier football, was short-lived and he went on to have a nomadic coaching career in Mexico, Japan, Croatia, Saudi Arabia, Israel and his homeland - moving back to England after a spell in charge of Huracan ended in autumn of 2007
Son Pablo is a left-back for Hertford Town in the Molten Spartan South Midlands League Premier Division
Gerry Armstrong, what a worker he is...striding away there with Hamilton to his right and Whiteside up on the far side of the area... Still Billy Hamilton, he's gone past Tendillo... Arconada... ARMSTRONG!
John Motson commentates on Gerry Armstrong's goal against Spain at the 1982 World Cup
Gerry Armstrong Armstrong only began playing football as a teenager while serving a ban from Gaelic Football. Best known for scoring the winner in Northern Ireland's legendary win over hosts Spain at the 1982 World Cup, he worked as assistant to two NI managers, Bryan Hamilton and Lawrie Sanchez, and is now a TV pundit and newspaper columnist.
Terry Gibson Diminutive but determined striker who won the Cup with Wimbledon in 1988. Like Armstrong, Gibson coached Northern Ireland under Sanchez, and he also worked with his former 'Crazy Gang' team-mate at Wycombe and Fulham before leaving Craven Cottage when Sanchez was sacked in December 2007. Gibson has also coached at Barnet, been a property developer, organised tennis tournaments and run his own company selling bikes branded with football club badges.
Glenn Hoddle Sacked as England manager in 1999 for comments about disabled people, Hoddle relaunched his managerial career with Southampton before leaving for Tottenham in 2001 in acrimonious circumstances. Adored by Spurs fans as a player but his spell as boss was less successful and he was sacked two years later. A stint with Wolves was also unfruitful and he now is trying to set up a football academy in Spain. Hoddle has also been linked with a return to Southampton to replace new Scotland boss George Burley.
Ricardo Villa The scorer of one of the greatest Cup final goals, against Manchester City in 1981. Villa wound down his carer in the US and Colombia before returning to Argentina. Worked under Ardiles at Racing de Avellaneda in 2002 and has been director of football at second division side Talleres Cordoba - a feeder club for French side St Etienne - since 2005.
John Pratt Replaced Aleksic after 100 minutes
Played 415 games for Spurs and later a youth team coach under Burkinshaw and assistant manager to Peter Shreeves before being sacked in 1986. Coached in the US and South Africa but became a window cleaner when he returned to England in 1989. Has also worked as a match-day host at White Hart Lane and scouted for Aberdeen.
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