He does, however, hope he doesn't have the best of times when Liverpool face the Red Devils during the new campaign.
“I haven't spoken to him but… a lot of people will talk about the money and things like that," Henderson told Sky Sports.
“But for Manchester United it's obviously a good signing because I think Harry's a fantastic player and he'll do a fantastic job there, I'm sure.
“When we play against him I hope he doesn't play very well.
“But he's a great lad and it's a great move for him so I'm sure he will do very well there."