This week's Champions League round of 16 ties saw Barcelona overturn a 2-0 deficit against AC Milan, and Arsenal go close to recording a shock 3-0 win away at Bayern Munich.

So, it seems appropriate to look back at some of the greatest comebacks this competition has ever seen.

5. Barcelona 5-1 Chelsea | 1999-00 quarter-finals

After the first half of the first leg at Stamford Bridge, Chelsea were 3-0 up in this tie. But Luis Figo managed to score in the second half to give Barcelona some hope for the return leg. Early goals in the Nou Camp by Rivaldo and Figo made it 2-0 to Barcelona on the night, with the Catalan giants looking like going through on away goals, before Tore Andre Flo scored to put Chelsea back ahead on aggregate. 

Barcelona, though, went on to score three more goals on the night, taking them through after extra time.

4. Deportivo 4-0 AC Milan | 2003-04 quarter-finals

One of the most astounding games in Champions League history. Having been demolished 4-1 in the first leg at the San Siro, Deportivo looked all but out. However, a fifth-minute goal by Walter Pandiani gave Deportivo some hope, and this hope grew into belief when Juan Carlos Valeron made it 2-0 in the 35th minute. Albert Luque struck right on half-time to make it 3-0 to the Spanish side and, in the second half, Gonzalez-Fran added the icing on the cake, making it 4-0 and a truly sensational comeback against of the giants of European football.

3. Monaco 3-1 Real Madrid | 2003-04 quarter-finals

After winning the first leg 4-2, the Galacticos of Real Madrid must have felt confident of brushing aside Monaco in the second leg of this tie. Unfortunately for them, they came up against a truly inspired Monaco team. Despite going 1-0 down to a Raul goal, making it 5-2 to Madrid on aggregate, Monaco fought back with a Ludovic Giuly brace and a Fernando Morientes strike proving enough, in what was a season of Champions League shocks.

2. Juventus 2-3 Manchester United | 1998-99 semi-finals

Manchester United's European campaign in 1998-99 was one of the most thrilling Europe has ever seen. After great games such as the 3-3 draws with Barcelona, you expected drama, which is exactly what spectators got in the semi-final. 

After a 1-1 draw at Old Trafford in the first leg courtesy of a last-minute Giggs goal, United knew they most likely needed to win in Turin. But they made a disastrous start to the second leg, going 2-0 down in the early stages to a Filippo Inzaghi brace. United, though, showed their true steel. Inspired by captain Roy Keane who, although being booked meaning he would miss the final, gave the performance of his career. His header brought it back to 2-1, before Dwight Yorke's diving header made it 2-2. 

Eventually, the tie was sealed late in the second half when Yorke rounded the keeper only to be brought down, with Andy Cole on hand to tuck the ball in the net and send United to the final.

1. AC Milan 3-3 Liverpool (Penalties 2-3) | 2004-05 final

Simply one of the greatest finals of all time.

Liverpool, already huge underdogs going into this final, had finished fifth in the Premier League, meaning that as well as the pressure of being in a Champions League final, they knew failure to win would mean they would not be in the competition the following season. 

Milan made the perfect start to the game, with a goal in the first minute from club hero Paolo Maldini, converting a half-volley from a Pirlo free-kick. Hernan Crespo made it 2-0, slotting home Andriy Shevchenko's cross-cum-shot. 

Liverpool's fate looked to be sealed just before half-time, when a sumptuous pass from Kaka curved beautifully round the Liverpool defence, for Crespo to dink over the advancing Jerzy Dudek for 3-0. Somehow, Liverpool managed to rally in the second half, and a superb header by captain Steven Gerrard made it 3-1. This began a crazy six-minute period which then saw Vladimir Smicer make it 3-2 with a shot from just outside the box and then Steven Gerrard win a penalty, which Xabi Alonso managed to initially miss before slamming in the rebound. 

Once this period of the game was over, Milan took back the initiative but were unable to beat Dudek, with Shevchenko coming the closest - somehow missing from yards out. In the penalty shoot-out, Shevchenko was the man whose miss meant Liverpool were champions of Europe for the fifth time.


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