Jurgen Klopp has suggested he could step down as Liverpool boss if he was to win silverware with the club.
Liverpool face Arsenal at the Emirates Stadium on Friday, live on Sky Sports Premier League, where Klopp comes up against Arsene Wenger, who has been in charge of the Gunners for 21 years.
Klopp spent seven years as manager of both Mainz and Borussia Dortmund but he does not expect to match Wenger's longevity and says a trophy could signal his departure from Anfield.
"Stay here 20 years? Don't know, don't know," said the Reds boss.
"A few weeks ago I saw a statistic for the longest-serving coaches in the Bundesliga and I'm the record coach of two clubs - Mainz and Dortmund.
"It would be quite difficult to become the record coach at Liverpool. I don't know. As long as it works really, really well.
"That means there must be space for improvement, because even if you win something, which everyone here is desperately waiting for, it could be the moment I say, 'okay but now we have to leave it'. That is the moment nobody thinks of doing it, going out at the top.
"So far I think I have a very good feeling for these moments. In both situations, I think it was the right moment for both sides, for both parties, the clubs and me and my coaching staff. We will see. I don't feel I am close to that moment and everything is fine."
Wenger criticism 'not right'
He continued: "If anyone thinks they can make a similar career like Alex Ferguson or Arsene Wenger in clubs, I'm not sure it would be possible with the media of today.
"I think Arsene gets a lot of criticism. I've seen it since I've been in England, I'm aware of it and for sure it's not right.
"But he's still there and he's doing a brilliant job again. He's still top five, six, fighting for fourth and being involved in different cup competitions.
"He's obviously still very ambitious and as long as you feel that, and you feel the club gets the benefit of this, you can stay.
"If you are the only part who likes it, that's wrong. It needs to be a perfect fit.
"We feel that here, at this moment and I'm sure for the next few years, but you cannot force anything to happen."
Liverpool were 4-0 winners over Arsenal when they met at Anfield on August 27 but Klopp is expecting a much tighter contest on Friday.
"Arsenal are not parking the bus," he said. "They are not a long-ball playing team. They are complex.
"It's a real job to do. You close one gap and, wow, another one opens. We have to be ready for this.
"It will be exciting and I would buy a ticket if I was not there already."