The 74-year-old came out of retirement exactly a month ago today, when he was appointed as the Hornets’ new manager on a deal until the end of the season.
Now, he’s set to bring his Watford team to Old Trafford this afternoon (15:00 GMT kick-off) and will go up against Rangnick in England’s top flight for the first time in the process.
In our exclusive pre-match Q&A, we asked Ralf about Hodgson, Nemanja Matic, the top-four battle and the FA Youth Cup.
Scroll down to read, and watch, the full conversation that the boss had with our very own Stewart Gardner prior to today’s fixture.