Liverpool manager Jurgen Klopp has warned his players against complacency as the Reds prepare to face Manchester United in the Europa League.
Klopp's men produced a very positive performance as they registered a 2-0 win against the Red Devils at Anfield.
But the German wants his players to be fully focused on the job tonight.
"It's football, the ball is round and everything can happen," Klopp said.
"I'm not scared or something like this, I'm not afraid. We have the chance and we [did] the best thing we could do in the first game, we made our position a little bit better.
"It's not perfect, it's not 5-0, it's not 6-0, it's not a holiday tomorrow, it's really hard work. That's no problem, I knew this before the draw, I knew it after the draw, I knew it before the first leg, I knew it after.
"It's better now because it's tomorrow, we don't have to wait another five days for the game. We want to take this chance for us, that's all.
"At the end, you know, if you want something with all you have it doesn't mean you get it. We know this because a lot of times in our lives we didn't get what we wanted but tomorrow we have a chance to work for it and that's what we try to do.
"I'm absolutely optimistic and before a game I always have the best feeling, but the problem is I lost a few games after having a very good feeling!
"That's not too important. It's football and, since I've been here, tomorrow is the third time we have played against Manchester United.
"We were always in the game in all three games so that's an important sign for us - the world doesn't change overnight.
"It's absolutely clear there's a chance for Manchester United, that's football, anything can happen. But we know that we know how to play them, that's another truth.
"It doesn't mean that it's easy for us, we have to work really hard for this, we have to be really concentrated, we need to be brave, we need to be aggressive in a legal way.
"I don't think too much about what will happen tomorrow night, we have a few hours to prepare ourselves."