The 20-year-old joined United from Fulham this summer and is currently in North America for the club’s pre-season tour.
Smalling has revealed that fellow defenders Wes Brown and Jonny Evans have helped him settle in at United.
He said: “The tour has been a really enjoyable experience so far. It was great to meet everyone, initially at Carrington.
“I have spent quite a bit of time with Wes and Jonny, my fellow centre-backs.
“And I have also been chatting to a lot of the younger lads. It is just great to get to know everybody and be part of such a great club. I just want to do my best.”