Barcelona completed the biggest comeback win in Champions League history when they defeated Paris Saint-Germain last month.
The Catalan club overturned a 4-0 first-leg deficit with an incredible 6-1 victory at the Nou Camp to book their place in the quarter-finals.
It was an engrossing contest and one that got us thinking in Primary Planet. What are the other great sporting comebacks? Here is what we came up with ...
Liverpool fell behind in the opening minute against AC Milan and were 3-0 down at half-time in Istanbul, Hernan Crespo scoring a brace late in the half.
However, the Reds stunned the Italian giants with goals from Steven Gerrard, Vladimir Smicer and Xabi Alonso in a whirlwind five-minute spell early in the second period.
The game went to extra-time, where Liverpool clung on before prevailing in the shootout thanks to two saves from Jerzy Dudek.
Leinster trailed 22-6 at half-time against Northampton after conceding three tries during the opening 40 minutes at the Millennium Stadium.
Johnny Sexton delivered a rousing teamtalk during the break, urging his team-mates to take inspiration from Liverpool’s comeback in 2005, and the out-half led the fightback by scoring two tries within 12 minutes of the restart.
Nathan Hines also crossed for the Irish province, who scored 27 unanswered points in the second half to seal back-to-back European titles.
Offaly trailed by five points with as many minutes remaining at Croke Park but hit 2-5 in an incredible finale to lift the Liam McCarthy Cup.
Johnny Dooley and Pat O’Connor scored the goals for the Faithful County as they were crowned All-Ireland champions for the third time.
Tom Brady made history by becoming the first quarterback to win five Super Bowl rings but he did it the hard way!
The New England Patriots were 28-3 down against the Atlanta Falcons late in the third quarter but Brady dragged his side level, and they snatched a 34-28 victory in overtime.
Northern Ireland’s Dennis Taylor found himself 8-0 behind against Steve Davis, who was cruising towards a third successive world title.
But Taylor dug deep to draw level at 17-17, and he prevailed in a gripping final frame that went down to the final black.
A television audience of 18.5million were glued to their screens to watch Taylor’s magnificent win, despite the match finishing after midnight!
Europe recovered from a 10-4 deficit to stun the United States in what was dubbed as ‘The Miracle of Medinah’.
England’s Ian Poulter led the fightback as Europe claimed two crucial victories in the fourballs on the Saturday afternoon, and on the final day the USA failed to register the four points they needed to clinch victory.
Martin Kaymer’s win over Steve Strickler meant the match looked destined for a draw, but a Tiger Woods bogey saw Europe run out 14.5-13.5 winners.
Mayo angered Dublin by warming up in front of Hill 16 and it appeared a costly move as the Leinster champions moved into a seven-point lead.
But an Andy Moran goal sparked an incredible Mayo fightback and Ciaran McDonald fired over from an acute angle with two minutes amazing to snatch a 1-16 to 2-12 win.
Muhammad Ali defeated George Foreman in Zaire in what was one of the most iconic fights in boxing history.
Foreman had Ali up against the ropes for long periods, taking a heavy pounding, but Ali somehow soaked it up.
By the ninth round Foreman had tired and Ali took his chance, jumping off the ropes and unleashing a barrage of punches to knock his opponent to the canvas.
A 34-year-old Jimmy Connors looked down and out as he trailed 1-6 1-6 1-4 to Sweden's Mikael Pernfors but somehow managed to dig deep and claw his way back into the match.
Connors levelled the third set at 4-4 before pulling through to win it 7-5. With the momentum turned he went on to win 1-6 1-6 7-5 6-4 6-2.