The Greatest Champions League 2nd-Leg Comebacks
Bayern Munich and Paris Saint-Germain both face daunting tasks this week.
The reigning German and French champions both go into their Champions League quarter-final second-leg ties facing a 3-1 deficit, with the former unexpectedly trailing Porto and and the latter behind to Barcelona.
However, neither side should abandon hope as there have been several impressive second-leg comebacks in the history of the competition. Here are eight of the best...
Deportivo La Coruna vs. Milan (2003-04 Quarter-Finals)
1 of 8On 7 April 2004, Deportivo La Coruna pulled off one of the greatest two-legged upsets in Champions League history when they advanced at the expense of holders Milan.
Depor received a 4-1 rollicking in the first leg at the San Siro, with Kaka, Andriy Shevchenko and Andrea Pirlo getting the goals in a devastating eight-minute period.
The tie looked dead and buried when the second leg kicked off in A Coruna, but somehow Albert Luque managed to put the Spaniards ahead on away goals when he made it 3-0 just before half-time. Fran Gonzalez added another with 15 minutes to go to complete a famous 5-4 aggregate victory.
Monaco vs. Real Madrid (2003-04 Quarter-Finals)
2 of 8Depor's unlikely win wasn't the only impressive comeback of the 2003-04 quarter-finals.
A Galactico-laden Real Madrid were favourites to win the competition and looked to have booked their place in the final four when they beat Monaco 4-2 at the Bernabeu.
However, the return leg in the moneyed principality didn't go according to plan for Los Blancos. Ludovic Guily cancelled out an early Raul goal with two of his own, putting the aggregate score at 5-4 to Madrid at half-time.
The killer blow was delivered shortly after the break by none other than Fernando Morientes, who had been edged out of the Madrid team by Vicente del Bosque and sent on loan to the Ligue 1 side.
His revenge strike put Monaco through on away goals, and he finished the tournament as top scorer after they eventually lost out to Jose Mourinho's Porto in the final.
Arsenal vs. Porto (2009-10 Round of 16)
3 of 8Porto fans who are currently getting ahead of themselves should remember their round-of-16 encounter with Arsenal in 2010.
The Portuguese side were 2-1 victors at the Estadio Dragao thanks to goals from Silvestre Varela and a young upstart named Radamel Falcao.
When they visited the Emirates three weeks later, they were destroyed 5-0 by a Gunners side that earned a quarter-final tie with Barcelona.
To make matters worse for Porto, three of the goals scored in the second leg were scored by Nicklas Bendtner. Oh, lord.
Chelsea vs. Napoli (2011-12 Round of 16)
4 of 8The wheels came off Andre Villas-Boas' reign at Chelsea when his side lost 3-1 at Napoli in their 2011-12 round-of-16 first-leg tie, with Ezequiel Lavezzi and Edinson Cavani wrapping up the goal action before half-time.
AVB was given his P45 a few days later, with club favourite Roberto Di Matteo taking charge for the second leg at Stamford Bridge. Chelsea were a team transformed, with Didier Drogba and John Terry finding the net before a Frank Lampard penalty in the 75th minute made it 4-4 on aggregate and brought the tie to extra time.
After 195 minutes of playing time, Branislav Ivanovic blasted the ball into the roof of the net to complete a highly unlikely comeback that put the Blues on the path to a shock win in the final.
Chelsea vs. Paris Saint-Germain (2013-14 Quarter-Final)
5 of 8PSG find themselves 3-1 down going into their quarter-final second leg with Barcelona, a plight they inflicted on Chelsea in last year's competition at this stage.
The Parisians could learn a thing or two from the manner in which Mourinho's team pulled off a 2-0 victory at Stamford Bridge to progress on away goals.
Amid accusations of parking the bus, the Blues progressed to the semi-finals thanks to substitute Andre Schurrle's opener and a dramatic 87th-minute striker from his fellow substitute Demba Ba.
Barcelona vs. Chelsea (1999-00 Quarter-Finals)
6 of 8Chelsea have pulled off a few second-leg comebacks in Europe, but at the 1999-00 quarter-finals stage, they were on the receiving end of one of them.
On 5 April 2000, the pre-Abramovich Blues managed to go 3-0 up against European giants Barcelona at Stamford Bridge before Luis Figo pulled back a consolation for the visitors.
Chelsea needed to defend their two-goal lead at the Camp Nou two weeks later, and Tore Andre Flo was able to find the net, but goals from Dani Garcia, Rivaldo and Luis Figo took the tie to extra time.
In the final half an hour of the tie, Rivaldo and Patrick Kluivert scored to give a 5-1 victory on the day and a 6-4 win on aggregate.
Barcelona vs. Milan (2012-13 Round of 16)
7 of 8Goals from Kevin-Prince Boateng and Sulley Muntari gave Milan a 2-0 win over Barcelona in their round-of-16 clash in 2012-13.
The Rossoneri travelled to the Camp Nou safe in the knowledge that no side had ever overcome a two-goal first-leg defeat without the benefit of an away goal. But then again, no other side boasted Leo Messi in the kind of form that allowed the Blaugrana to pull level on aggregate by half-time of the second leg.
Additional goals from Jordi Alba and David Villa gave Barca a 4-0 victory and a belief that they could go all the way. Which was quickly diminished when Bayern Munich beat them 7-0 in the semi-finals.
Juventus vs. Manchester United (1998-99 Semi-Finals)
8 of 8Manchester United staged what must be the biggest comeback in European Cup history with their last-gasp Champions League final win in 1999, but the Red Devils also had to overcome a deficit at the semi-final stage.
United scraped through the first leg at Old Trafford when Ryan Giggs bagged a 93rd-minute equaliser to cancel out Antonio Conte's opener.
The Old Lady cruised in the opening movements of the second leg, going 2-0 up in the first 11 minutes thanks to a Pippo Inzaghi brace.
Sir Alex Ferguson's side found themselves 3-1 down on aggregate and needing to score three goals to stay in the competition. That's exactly what happened, as Roy Keane and Dwight Yorke levelled the second leg before Andy Cole sent United to the final with a dramatic 84th-minute winner.
It was the greatest Italian job since Michael Caine took some Minis to the boot-shaped nation.
