France and Arsenal legend Thierry Henry has tipped Anthony Martial to become a 'world-class player' at Manchester United following the bright start to his career.

The 21-year-old became the world's costliest teenager when joining the Red Devils from Monaco in a potential £58m deal two years ago, going on to enjoy an impressive maiden campaign at Old Trafford.

Martial found life a little tougher last time out but has since responded in the early stages of 2017-18, with five goals and four assists in his first nine appearances - just five of those being starts.

France and Arsenal's all-time record goalscorer believes that his compatriot has already achieved more than him at the same stage of their careers, despite Henry being a World Cup winner at the age of 21.

"Anthony Martial is a far better player than I was at that age," he is quoted as saying by the Daily Mail. "Martial can be world class."

Martial has 45 goals and 31 assists in 174 senior club outings overall, while Henry had 22 and one respectively in 79 fewer appearances.