Tuesday 10 April 2018 19:43, UK
Manchester City have a mountain to climb if they are to make it into the Champions League semi-finals.
Their 3-0 defeat at Liverpool last week means they must score three unanswered goals on Tuesday just to take the quarter-final second leg to extra-time.
If the Reds find the net at the Etihad, City will need five.
It's an unenviable task and Liverpool are huge favourites to make it into the final four, especially given City's confidence-damaging defeat to Manchester United on Saturday.
But two teams in Champions League history have faced similar challenges and found a way to turn things around.
In 2004, Deportivo de La Coruna trailed AC Milan 4-1 after a disastrous first-leg loss in Italy, which saw Kaka, Andrei Shevchenko and Andrea Pirlo do the damage. But two weeks later they staged an incredible comeback, with Fran hitting the decisive goal 15 minutes from time after a three-goal first-half blitz had stunned Milan.
Barcelona produced an even more sensational fightback against Paris Saint-Germain last season.
The Spanish giants were shocked 4-0 in the French capital, and despite dragging the aggregate score back to 4-3 only 50 minutes into the second leg, Edinson Cavani's counter-strike left Barca needing three more goals in the remaining 28 minutes.
They were still in search of those three goals with two minutes of regular time to play. Incredibly, thanks to some inspiration from Neymar and a cool finish from Sergi Roberto, they got them, as PSG crumbled.
Guardiola's own history of overturning first leg defeats in Champions League knockout ties isn't impressive, though. His teams have progressed on just two of the seven occasions they've lost a first leg.
His Barcelona team bounced back from a 2-1 defeat at Arsenal in 2011 with a 3-1 win at the Nou Camp. And his Bayern Munich side responded to a shock 3-1 loss at Porto with a 6-1 thrashing of their opponents in the second leg in 2015.
The odds are stacked against them - but Deportivo and Barcelona have shown it can be done…
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