Wayne Rooney is adamant “anything can happen” as Manchester United wait for Friday's Champions League quarter-final draw.
United joined Premier League rivals Chelsea in the last eight after they overturned a two-goal deficit against Olympiacos thanks to Robin van Persie's hat-trick on Wednesday.
Three-time winners United are 18-1 shots to lift the trophy but are more than capable of upsetting the odds against a strong field.
As well as the Blues, the quarter-final draw contains reigning champions Bayern Munich and their Bundesliga rivals Borussia Dortmund, Spain's title-chasing trio Barcelona, Real Madrid and Atletico Madrid and big-spending French champions Paris St Germain.
Champions League: The last eight teams standing
Champions League: The last eight teams standing
1/8 ATLETICO MADRID
Best: Runners-up (1974)
Star man: Diego Costa
Overview: Have let their chances of winning the Primera Division slip lately, but they are still having a superb year thanks to the 22 goals of Diego Costa. A 5-1 aggregate win over AC Milan in the last 16 will have done their confidence no harm.
Best: Winners (1992, 2006, 2009, 2011)
Star man: Lionel Messi
Overview: Also likely to lose out to Real Madrid for the La Liga title following a recent dip in form. Kept their European dream alive with relatively straightforward 4-1 win over Manchester City in the previous round.
3/8 BAYERN MUNICH
Best: Winners (1974, 1975, 1976, 2001, 2013)
Star man: Franck Ribery
Overview: Pep Guardiola is hoping to join an exclusive club of coaches who have won the Champions League with two different clubs. Bayern, unbeaten in the Bundesliga, wasted little effort getting past Arsenal in the second round.
4/8 BORUSSIA DORTMUND
Best: Winners (1997)
Star man: Robert Lewandowski
Overview: Defeated by Bayern in last year's final. Some 23 points behind their rivals in the Bundesliga and went down to a disappointing home defeat to Zenit St Petersburg in the second leg of their last-16 tie.
Best: Winners (2012)
Star man: Eden Hazard
Overview: Chelsea surrendered the initiative to Manchester City in the Premier League title race last weekend when they lost to Aston Villa, but few would bet against Jose Mourinho winning a third Champions League trophy after their ruthless display against Galatasaray in the last round.
6/8 MANCHESTER UNITED
Best: Winners (1968, 1999, 2008)
Star man: Robin van Persie
Overview: David Moyes has endured a horrid debut season domestically, but his team gave United fans a night to remember on Wednesday when they overturned a two-goal deficit to progress at the expense of Olympiacos.
7/8 PARIS SAINT-GERMAIN
Best: Semi-finalists (1995)
Star man: Zlatan Ibrahimovic
Overview: Deprived of a place in the World Cup, Ibrahimovic will be looking to prove to the world that he is just as good as he thinks he is. PSG's expensively-assembled squad hammered Bayer Leverkusen 6-1 on aggregate in previous round.
8/8 REAL MADRID
Best: Winners (1956, 1957, 1958, 1959, 1960, 1966, 1998, 2000, 2002)
Star man: Cristiano Ronaldo
Overview: After a 12-year wait, this could finally be the season when Real Madrid finally achieve la decima (the 10th European Cup). Ronaldo is two goals shy of breaking Lionel Messi's record of 14 in one Champions League campaign following his four-goal haul in the 9-2 aggregate win over Schalke.
England striker Rooney said: "I think in cup football anything can happen. We're in the quarter-final so you never know what can happen from there.
"You look at the three Spanish teams left in the competition, they're all good teams. Chelsea are probably playing the best football this season and obviously you've got Bayern Munich.
"PSG are playing well. It's a talented group of teams so whoever we get I'm sure it will be tough."
Chelsea's Premier League campaign faltered at the weekend when they lost to Aston Villa, but they bounced back with a 2-0 win over Galatasaray on Tuesday.
Manager Jose Mourinho's hunger for success in the competition cannot be doubted either. If Chelsea win the Champions League, he will be the only manager other than Bob Paisley to lift the trophy three times.
Despite all the bravado from both camps, perhaps the best way for England to have a team in the last four is if United and Chelsea draw each other in the quarter-finals.
The other six teams left in the hat have won 19 European Cups between them and those that have not won the competition are certainly capable of doing so this time around.
Bayern coach Pep Guardiola, who won the Champions League twice with Barcelona, has some of the best players in the world at his disposal.
The Germans, who are unbeaten at the top of the Bundesliga, are favourites for the trophy, just ahead of Real Madrid and Barca.
United or Chelsea would have trouble shackling Real star Cristiano Ronaldo, who needs two goals to break Lionel Messi's record of 14 in one Champions League campaign.
Messi helped Barca to a 4-1 aggregate win over Manchester City in the previous round while Atletico beat AC Milan 5-1.
Last year's beaten finalists Dortmund have some of the most exciting players on the continent and with hundreds of millions of pounds' worth of talent at their disposal, PSG would also be formidable opponents.
The first legs of the quarter-finals will take place on April 1 and 2, and the return fixtures will be played the following week as teams bid to reach May 24's final in Lisbon.