New Manchester United striker Anthony Martial says he is unconcerned by his £36 million price tag as his record fee

continues to make waves in his native France.

Martial, 19, joined United from Monaco on Monday as he became the most expensive teenager in football’s history.

After returning to the French national team’s headquarters on Tuesday after his brief trip to Old Trafford, Martial said

he cannot wait to get started.

“It was a restless night,” he said in a video interview posted on the French Football Federation’s website. “I’m very happy to sign for Manchester United. It’s a very big club and I hope I’ll be able to show all my qualities.

“There’s certainly been a lot of talk about it [the transfer] but the most important thing will be on the pitch and to show people who I am.

“Football is football — it’s changed nothing. You have to stay true to yourself and keep your head on your shoulders.”

L’Equipe reported on Tuesday that, when bonuses are included, the deal for Martial could eventually be worth €80m, which would make him the most expensive French player in history. Former Chelsea defender Frank Leboeuf, a World Cup winner with France in 1998, was critical of the fee, saying it showed there were no limits and that it was impossible to tell a player’s worth anymore.