Jose Mourinho's side have a fairly easy start to the season and, incredibly, will face none of last season's top six until they visit Anfield on the October 14.
In the build up to the game he had talked, yet again, about his unhappiness with the club's lack of activity in the transfer market.
When the pair clashed in this corresponding fixture in the Championship last season, it was Rafa Benitez's side which emerged victorious thanks to goals from Matt Ritchie, Daryl Murphy and Dwight Gayle.
But the tide turned in the 50th minute when Mooy played a one-two with Elias Kachunga and shot into the top corner.
"He doesn't really say much, doesn't smile a lot, he's very calm but he is for sure very happy and very proud as well, and I think he deserves all the credit for his goal", Wagner added.
"It's been a great start so far, but we can't get carried away", he said. "Obviously we are working behind the scenes trying to do things but I don't know what our position is at the moment", he said.
Hoyle's influence as chairman can not be underestimated but energy and self-belief drips from Wagner and the charismatic German continues to transmit that desire to his players.
Henry, arguably the Premier League's greatest ever player, described the former Melbourne City midfielder as "magic".
Newcastle eventually seemed to settle into the half after 25 minutes, finally seeming to limit Huddersfield's ability to create chances.
"It's a learning process for us, and hopefully we can learn quickly".
But the firsts don't stop there; the goal also goes down as Huddersfield's first top-flight home goal in 45 years.