James signed for the Red Devils from Championship side Swansea City last summer for a reported fee of £15 million.
The Welshman was close to joining Leeds United in January 2019, but he was forced to see out the rest of the 2018-2019 season at the Liberty Stadium when negotiations between the two clubs went south.
James marked his Manchester United’s debut with a goal, coming off the bench to help seal a thrilling 4-0 victory for Ole Gunnar Solskjaer’s men against Chelsea on the opening day of the Premier League.
The 22-year-old’s form has taken a big dip in recent months but still remains a reliable player whose pace is often relied upon during United’s counterattacks.
In an interview with NBC Sports, James revealed how he was signed by the Premier League outfit and insists he needs to prove his worth at Old Trafford.
He said: “I can't remember the exact place I was but I know it was a time near the end of the season.”
“It was only talk at the start so I didn't really believe it to be honest. I still don't believe it now!”
“It was a mad time - I was enjoying my time at Swansea, we had a good end to the season and tried to push for the play-off spots but we didn't end up getting them.”
“To hear that Manchester United were interested was surreal for me because it was my first year in senior football.”
“The year before I'd went out on loan and not played so it was just surreal and at the first moment I didn't believe it.”