Derksen insists the Dutchman is overrated.
He told Veronica Inside: "I think he is such an overrated boy.
"At NEC, he stood on his own two feet for the first time and worked with his computers, but nobody took him seriously.
"That kid is apparently easy for Jürgen Klopp to lean on, but he has never played football himself. He is handy with his laptop, but what should he teach people at Liverpool?
"On the bench he says something to Klopp, hoping that he is in the picture so that it looks like he is advising Klopp.
"What does he say? No idea. Whether he wants sugar in his tea at halftime, perhaps. I can't imagine Klopp leaving the training to him. He always has a laptop under his arm, but we've seen him at NEC and it was impossible to tie a rope."