Liverpool boss Jurgen Klopp has said he does not plan to match the long reigns enjoyed by Sir Alex Ferguson and Arsene Wenger and could even walk away if he wins a major trophy.
Klopp, 50, took charge at Liverpool in 2015 after having previously managed both Mainz and Borussia Dortmund for seven years.
He has previously suggested he would be happy if Liverpool were to be his final club, but he played down the notion that he could stay on as long as Ferguson, who managed Manchester United from 1986 to 2013, or Wenger, who has been in charge at Arsenal since 1996.
"Stay here 20 years? Don't know, don't know," he said ahead of Friday's game against Arsenal. "So far, after seven years, I've felt maybe I should move on.
"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."
Liverpool's longest serving manager is Tom Watson, who led the club from 1896 to 1915, and Klopp said: "It would be quite difficult to become the record coach at Liverpool. I don't know.
"As long as it works really, really well, I will carry on. That means as long as there is space for improvement because even if you win something, which everyone here is desperately waiting for, it could be the moment I say, 'OK, but now we have to leave.'
"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.
"We will see. I don't feel I am close to that moment and everything is fine."
He added: "If anyone thinks they can make a career like Alex Ferguson or Arsene Wenger in clubs, I'm not sure it would be possible.
"I think Arsene gets a lot of criticism. I've seen it since I've been in England and for sure it's not right, but he's still there and he's doing a brilliant job again. Top five, six, fighting for fourth and being involved in different cup competitions and things like that. He's obviously still very ambitious."
Klopp, who signed a new six-year contract in July 2016, has yet to win any silverware at Anfield but reached the League Cup and Europa League finals in 2016.