The pair have slotted straight into Ole Gunnar Solskjaer's first-choice defensive line-up and Jones thinks both players have enjoyed a great start to life at Old Trafford.
“Aaron's come in and settled in well and, likewise, Harry. He carries a bit more experience than Aaron but they've helped a lot," Jones told Inside United.
“Aaron's up and down [the pitch], his tackling's probably some of the best I've seen, and no one wants to go past him. You see players now stopping, turning around and going the other way, so that's a credit to him.
“Harry's got the international experience. He's a big, strong defender who has helped us and I'm sure he'll be a great addition going forward."