The Austrian did concede that Guehi was a tad disheartened that his Liverpool transfer did not come to pass, but his attitude and commitment to the cause for the Eagles has been exemplary.
He told reporters: "I have no concerns at all [about Guehi]. I'm completely convinced, and I mention this quite often, as long as Marc is playing for Crystal Palace, he will be playing with 100 per cent. This is what I expect tomorrow [against Liverpool].
"I'm really convinced that he will show this again. He's an amazing player, he's in amazing shape. So I expect a great game from him. Of course, I had a conversation with Marc but I think you will expect it to maybe have been more or longer, it was really a very short conversation because it was easy. We talked before, we talked at the end of last season, we talked in off-season, we talked in the pre-season, and of course we talked after the transfer window closed but it was a five-minute conversation.
"On the other side, I'm really wondering why it's so outstanding if you stick to an agreement, it also shows you maybe what kind of times we are living in. If you sign a contract, let's say the normal thing is you stick to your contract, so we are praised for doing what we have to do, I think it's more the opposite, we should blame people who don't stick to their agreement.
"Of course he was a little bit disappointed at the beginning but he said 'no, it's fine, I like being here, I like the team, I like the staff, I like Crystal Palace, I'm a south London boy, it's all good, I will give my best,' and this is exactly what I knew would happen."