Jurgen Klopp says Liverpool's famous comeback against Barcelona would never have happened without fans at Anfield.
The Reds famously came back from 3-0 down on aggregate to knock the Catalan giants out of the Champions League in 2019, winning 4-0 at Anfield in a memorable match.
With matches now being played behind closed doors due to Covid-19, Klopp has realised that the comeback would never have happened without fans.
Speaking to Lockdown Live, Klopp said that the brief return of fans made players and staff once again realise what they are missing.
"I've never really thought about it, to be honest," he said.
"It's just how it is, we can't change it. We've had three games now with 2,000 fans, which was really nice and showed us how good it can be and how good it could be.
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"Again, now it's a bit like 'now we miss it'. Before that, we got used to it, then we had 2,000 supporters in and everyone thought it was great and was hoping for the next step.
"It didn't happen and now we miss it again.
"The football would not be the same without supporters. Not only for the atmosphere but for the game, they're game-changers.
"A good atmosphere helps the players to play a really, really good game. An example for us, could we have won 4-0 against Barcelona at home without supporters? No chance.
"I'd really say no chance. With the crowd, it was possible. That shows.
"We could have won the game 1-0 and then Barcelona went through but it was two things - it gave us a boost and them a problem.
"We had 60,000 plus 11 on the pitch, very positive, loaded people against 11 not so positive people, so it wasn't a fair competition.
"That's what I miss really. I know we'll have it back, the only problem is between now and then we obviously have to work a bit without them.
"All of us try our best and I've seen a lot of good football games without supporters so the teams are doing really well, we have to create the things by ourselves. We try our best but I hope it won't last forever."