Telegraph Sport's Northern Football Correspondent, Mark Ogden, suggests six reasons why Manchester United fans can believe their team will defeat Bayern Munich
World, European and German champions Bayern remain odds-on favourites to progress in next Wednesday's second-leg at the Allianz Arena, but United can at least travel to Bavaria with some grounds for optimism.
1 - BAYERN'S HOME HOODOO AGAINST ENGLISH CLUBS:
Bayern have become a machine which sweeps aside all before them, but English opposition in Munich appears to be the one glitch in the system.
The European champions have now failed to win any of their last four games against English clubs at the Allianz Arena - losing to Manchester City and Arsenal in 2013, with Chelsea's penalty shoot-out win in the 2012 Champions League Final and Arsenal's draw last month completing the sequence.
Even Bolton Wanderers emerged from the Allianz with a 2-2 draw in the Uefa Cup in November 2007.
The bad news for United is that they lost 2-1 on their only previous trip to the Allianz Arena, in March 2010.
2 - UNITED HAVE THE EDGE WITH A 1-1 FIRST-LEG DRAW:
Over the last five years, 53 per cent of teams who have emerged with a 1-1 first-leg draw at home have progressed to the next round.
United were on the wrong end of this statistic last season, after being eliminated by Real Madrid following a 1-1 draw at the Bernabeu in the first game.
Historically, United have also profited after drawing 1-1 at home in the first-leg.
The 1999 Champions League semi-final against Juventus is the most memorable example, but they also eliminated Montpellier on the way to the 1991 European Cup-Winners' Cup after being held 1-1 at home by the French club in the first-leg.
3 - BAYERN SUSPENSIONS:
Regardless of the embarrassment of riches at Pep Guardiola's disposal, Bayern will miss the suspended Bastian Schweinsteiger and Javi Martinez in Munich.
Schweinsteiger's box-to-box energy will be one less thing for United to worry about and although the absence of Martinez will be softened by the return from suspension of Brazilian centre-half Dante, the Spaniard's class on the ball will be a loss to the home side.
United will have Patrice Evra available after suspension, with Rafael and Chris Smalling expected to be fit to return.
The greater defensive options could enable David Moyes to move Phil Jones into midfield and spare United supporters the anguish of watching Marouane Fellaini in the Allianz.
4 - NOBODY HAS SUCCESSFULLY DEFENDED THE TITLE:
Although many clubs, including Bayern, successfully retained the old European Cup, it has never been won back-to-back in the Champions League.
United and Ajax both managed to defend it all the way to the Final, before losing in Rome to Barcelona and Juventus respectively, so Bayern must rewrite history to keep the trophy at the Allianz this season.
The problem for United is that somebody else could deny Bayern en route to the final in Lisbon, but if the fates are conspiring against Bayern winning it this year, maybe United can take advantage.
5 - MIRACLES CAN HAPPEN, JUST ASK LIVERPOOL AND CHELSEA:
What is it with English clubs who endure a nightmare season in the Premier League, but somehow salvage their campaign by qualifying for the Champions League by winning it?
Liverpool produced the 'Miracle of Istanbul' to win the 2005 Champions League after finishing fifth in the league, while Chelsea claimed their first European Cup by defeating Bayern in 2012 after ending up in sixth position.
United currently lie seventh and have no hope of finishing in the top four, so perhaps they can emulate Liverpool and Chelsea.
And just to boost their confidence a bit more - Aston Villa won the European Cup in 1981, despite finishing 11th. Villa defeated Bayern Munich in the Fina.
6 - IS MOYES ANOTHER LISBON LION?
OK, this is perhaps the flimsiest of the lot, but mention Glaswegians and Lisbon in the same sentence and you will instantly be directed to Celtic's 1967 European Cup triumph against Inter Milan in the Portuguese capital.
Jock Stein's team, built from a squad of Glaswegians, became known as the Lisbon Lions following their heroic success.
This year's final is in Lisbon and Moyes is from Glasgow, so on that basis, Uefa should hand the trophy over to United right now.