The UEFA Champions League has seen some incredible comebacks over the years. Here are five of the greatest Champions League comebacks ever:

Barcelona 6-1 Paris Saint-Germain (2016-17)

Barcelona were the defending champions but faced a daunting task after losing the first leg 4-0 in Paris. However, they started the second leg with a bang, scoring two goals in the first 10 minutes. PSG responded with their own goal, but Barcelona scored three more goals in the second half to complete the comeback. The score line of 6-1 was the biggest comeback in Champions League history at the time.

The comeback was dubbed "La Remontada" (The Comeback) by the Spanish media. It was one of the most-watched football matches ever, with over 360 million viewers worldwide. The match was also notable for the performance of Lionel Messi, who scored two goals and assisted another.

Liverpool 4-0 Barcelona (2018-19)

Liverpool were the underdogs in the semi-final but performed remarkably in the second leg at Anfield. They scored four goals in the first half, with Divock Origi scoring twice and Georginio Wijnaldum scoring a hat-trick. Barcelona could not respond, and Liverpool went on to win the match 4-0. The score line of 4-0 was the biggest win by a team in a Champions League semi-final second leg.

The comeback was dubbed "The Miracle of Anfield" by the British media. It was one of the most dramatic comebacks in football history, and it helped Liverpool to reach their first Champions League final in 11 years.

AC Milan 3-3 Liverpool (2005)

AC Milan were the favourites in the Champions League final, but Liverpool pulled off one of the greatest comebacks in history. AC Milan took a 3-0 lead at half-time, but Liverpool scored three goals in six minutes to level the match. The match went to extra time, and Liverpool won the penalty shootout 3-2 to lift the trophy. The comeback is known as "The Miracle of Istanbul".

The comeback is considered one of the greatest sporting achievements of all time. It was also a significant turning point in Liverpool's history, as it helped to restore the club to its former glory.

Manchester United 2-1 Bayern Munich (1999)

Manchester United were the underdogs in the Champions League final, but they pulled off a dramatic comeback to win the trophy. Bayern Munich took a 1-0 lead in the first half, but Manchester United equalized in the second half with a goal from Teddy Sheringham. With just seconds remaining, Manchester United scored again, with a goal from Ole Gunnar Solskjaer. The score line of 2-1 was the biggest comeback in a Champions League final.

The comeback is known as "The Greatest Night in Europe" by Manchester United fans. It is considered one of the greatest comebacks in sporting history, and it helped cement Manchester United's status as one of the greatest clubs in the world.

Deportivo La Coruna 4-0 AC Milan (2004)

AC Milan were the defending champions, but they were stunned by Deportivo La Coruna in the quarterfinals. Deportivo La Coruna won the first leg 1-0 and the second leg 4-0 to progress to the semi-finals. The score line of 4-0 was the biggest win by a team in a Champions League quarterfinal second leg.

The comeback is considered one of the greatest upsets in Champions League history. It helped establish Deportivo La Coruna as a significant force in European football and showed that even the biggest teams could be beaten on their day.

These are just five of the greatest European Champions League comebacks ever. There have been many other incredible comebacks over the years, and it will be interesting to see if any team can top these in the future.