Jurgen Klopp has backed Steve McClaren ahead of Liverpool's visit to St James's Park.
Newcastle United's head coach is under intense pressure after back-to-back defeats.
Ex-Borussia Dortmund manager Klopp – who took over at Anfield in October after Brendan Rodgers' dismissal – knows McClaren well from his time coaching in Germany with Wolfsburg.
McClaren lost his job at the Volkswagen Arena days after their last meeting in early 2011.
Asked about McClaren's future, Klopp said: "I had seven years at Dortmund, seven years at Mainz, so in my opinion (stability is) very important.
"But it can work in different ways. I don't know about the history of Newcastle, but I know Steve McClaren and his quality and his experience. We have to be aware.
"I'm still a new manager here. I can't tell you something about Newcastle. I know a bit of their problems in the last year. They thought they needed to buy players and so on, Newcastle haven't played in Europe for a while, so information in Germany was not easy to get.
"If I need to know more of Newcastle, I would take information. We have to play football against them."
Klopp also said he would show United "respect", despite their poor form.
He added: "People expect us to win this game? We expect to win it too. We always do. But that doesn't mean we don't have respect."
McClaren talked about his relationship with Klopp, and the job he is doing at Liverpool, at his pre-match Press conference yesterday.
He said: "He's a quality coach and I know him well. You can see what Dortmund had is coming in the Liverpool team. They have quality players who work hard. He is doing a good job."