Magath led Schalke to second in the Bundesliga a year after guiding Wolfsburg to the Bundesliga title in 2009, but the side's fortunes dipped last season when he was relieved of his duties as they fought against relegation.
Twenty four hours later, he returned to take over at Wolfsburg and now he is preparing to face his former club at the VW-Arena.
But the only part of Magath's past he will be remembering is how his former players play, and therefore how he can beat them.
"It is certainly an advantage that I and my coaching team have already worked together with most of their players," he said.
"We know Schalke's strengths very well, but we also know about their weaknesses.
"We have got to try and take advantage of this and transform it into points."
His replacement on the Schalke bench Ralf Rangnick did not want to discuss the past too much either, although he found warm words for his predecessor.
"He deserves recognition and respect for winning the title with both Bayern Munich and Wolfsburg," he told the Welt newspaper.
"He is certainly the most successful German coach in the last decade.
"However, that is enough about Magath's role in tomorrow's match.
"We are not playing against Felix Magath but against Wolfsburg," he told the Revier Sport newspaper.
"We are preparing for this in the very same way that we prepare for any other game. The task is always the same.
"Like in any other game, there are only three points at stake."
Rangnick has not yet decided whether new signing Teemu Pukki will be part of his squad, but he does have Jefferson Farfan, Raul and Klaas Jan Huntelaar in excellent form up front.
Thomas Hitzlsperger is Wolfsburg's only injury absentee.