The wildest Champions League in history Football Plenty of underdogs have sprung surprises

Is it necessary to change the Champions League and gamble on a closed European Super League?

The answer is no, as the Champions League of 2018/19 is proving that you shouldn't try to fix something that's not broken.

Liverpool, like Ajax, Tottenham, Manchester United and Juventus before them, have shown that in football nothing is impossible.

These comebacks and this wild Champions League season, will never be forgotten.

Liverpool's leave Barcelona without a final

The latest example from this Champions League season was Liverpool.

Without Mohamed Salah or Roberto Firmino, they still overcame Barcelona who had a three-goal lead.

They did it with two secondary players taking the lead, with Georgino Wijnaldum and Divock Origi scoring two goals each.

Liverpool's is the second greatest comeback in Champions League history, only behind Barcelona's 6-1 win over PSG in 2016/17.

Ajax ended triple champions Real Madrid's run

The first big surprise of the campaign came from Ajax, who came back from 2-1 down to win at the Estadio Santiago Bernabeu with a 4-1 second-leg victory over a side who had won the last three titles.

Goals from David Neres, Dusan Tadic, Hakim Ziyech and Lasse Schone ended the hopes of Santiago Solari's side in their biggest ever home defeat in the competition.

Cristiano Ronaldo got back at Atletico with a hat-trick

A third Spanish team crashed out in shocking circumstances as Atletico's 2-0 first-leg lead was not enough in Turin, with Cristiano Ronaldo scoring a hat-trick to knock them out in the quarter-finals.

It robbed the visitors of a chance to play this season's final in their own stadium.

Injury-hit Manchester United's comeback against PSG

Paul Pogba, Nemanja Matic, Ander Herrera, Anthony Martial, Phil Jones, Jesse Lingard, Matteo Darmian, Juan Mata, Alexis Sanchez and Antonio Valencia were all out of action as Manchester United travelled to Paris with a 2-0 first leg deficit.

Yet Romelu Lukaku's early goal provided hope and then the final 3-1 scoreline was sealed by Marcus Rashford's late penalty.

Casillas' Porto's night of glory

After losing 2-1 in the Italian capital, Porto welcomed Roma to the Estadio Do Dragao knowing that they would need every second to beat the Italian side and it worked out that way.

Alex Telles scored from the penalty spot in minute 117 to seal a 3-1 win and safe passage to the next round.

Ajax shocking again, this time against Juventus

Ajax have made this competition their own under Erik ten Hag and, after a 1-1 draw in Amsterdam, they stunned Ronaldo's Juventus in Turin with a 2-1 win, sealed with a header from young captain Matthijs De Ligt.

It earned the Dutch side their first Champions League semi-final in 22 years.

The incredible clash between Manchester City and Tottenham

Manchester City had to come from 1-0 down in the first leg and had already levelled the scoreline up by the fourth minute of the second.

By the hour mark, Manchester City were leading 4-3 on aggregate only for Fernando Llorente to score a controversial goal which many claimed should have been disallowed for handball.

Raheem Sterling seemed to have scored an injury time winner, sparking wild scenes, only for VAR to disallow the move for offside in the lead-up to the goal in an unbelievable rollercoaster finish.

A chaotic night in Amsterdam

Ajax held a 1-0 lead over Tottenham from the first leg in London, so when they went in 2-0 ahead on the night in the return fixture, the writing appeared to be on the wall.

Not in this year's Champions League though, and Mauricio Pochettino's decision to withdraw Victor Wanyama for Fernando Llorente inspired Spurs to an astonishing comeback.

Llorente was involved, but Lucas Moura stole the show with a second half hat-trick, with his third goal coming in the final second of five additional minutes on top of the 90, sending the Londoners through and breaking the hearts of Ajax's young dreamers.