'Well, he knows me now doesn't he!' says Martial, aware that United's captain was not the only one bemused by the club's decision to spend an initial £36million on a relatively little known forward from France.
'I've heard that story. I guess it's pretty amusing,' he says. 'I don't know whether it's true but it doesn't bother me at all.
'It's not a case of proving anything to other people. I don't pay too much attention to that. I want to prove to myself that I can succeed.'
I'd love to be an icon but I'll need to score a lot of goals
'I didn't try to put too much pressure on myself,' he says. 'Obviously, people mention the price tag but I just came here to do my best. What helped was that I'd already gone through quite an expensive transfer in the past when I moved from Lyon to Monaco.
'I just tried to remain true to who I am as a person. I've always been quite calm and relaxed, and had confidence in my ability.
'Things have gone relatively well but I feel deep down I could have done better. I hope things will go even better next season.'
'It just couldn't have been a better way to start. From being a kid I'd dreamed of playing at Old Trafford and to score in my first game in such a way against United's biggest rival — it couldn't have turned out better.
'It freed me up and helped me settle in. I drew a lot of confidence from scoring. Fortunately, things started to go well from that moment and I kept scoring regularly.'
Martial prefers to play through the middle but his versatility has drawn comparisons to Thierry Henry, who graduated from the same Paris-based club, CO Les Ulis. So, too, the cool demeanour and clinical eye for goal. Paul Scholes has gone so far as to say Martial doesn't 'look bothered' if he scores.
'I'd heard that,' he says. 'Not happy when I score? Scoring makes me happiest because it's what it's all about. I'm really happy inside but I'm
not a guy who shows that sort of emotion on the outside too much.'
'I love Manchester and see myself being here for a good while yet,' he says. 'If I was to become an icon I'd be very happy but you can't possibly say at this stage. It depends how I play, how many goals I score and how I perform in the years to come.
'I'll need to score a lot of goals and the team will need to pick up trophies. We're going to do everything we can to bring the FA Cup back to Manchester.'