With a first leg deficit of 3-0 from last Wednesday's game in Catalonia, Liverpool need one of those special European nights at Anfield to have any chance of a miraculous comeback.
"I celebrated it with my fans and then I asked for forgiveness and some Liverpool fans applauded me".
Some Liverpool supporters lined the entrance to the city's Hilton hotel where the travelling party and team stayed on Monday night as former favourite Luis Suarez returned to the city.
His role in leading Liverpool to the brink of a long-awaited Premier League title in 2013/2014 saw Barca splash out a then club record fee despite another biting incident on Italian defender Giorgio Chiellini at the 2014 World Cup that saw him banned by Federation Internationale de Football Association for four months.
Teenager Rhian Brewster could be in line for his Liverpool debut against Barcelona as injury problems have forced manager Jurgen Klopp to accelerate his promotion to the first team. Just because he used to wear a red shirt, it doesn't mean he has to pretend he is not excited to score a great goal in a massive Champions League game. "If I score a goal against Liverpool here I won't celebrate in the same way". I think there will be more applause than whistles.
Jurgen Klopp's side could be disappointed with last week's scoreline having pushed Barca back for the majority of the second half.
Dortmund had lost 3-0 away to Real Madrid in the first leg and were practically out, but in front of their impassioned support, they had the Spanish giants on the rack from first minute to last. "So we have no reason to be complacent".
But Klopp chose to change it up for the second leg with four changes and a switch in formation to 4-1-4-1 from his then preferred 4-2-3-1.
"It is a plus for the Liverpool player to play here, but we are also professionals and we will be at the level of a Champions League semi-final".
"We know about how big the challenge is, but this team is so wonderful".
"I have enough time to speak to my players until tomorrow night to make decisions".
"They have an added extra here - the fans, the 12th man".