Manchester United legend Gary Neville has admitted that he is surprised by the speed in which Anthony Martial has adapted to life in the Premier League.

The 19-year-old enhanced his burgeoning reputation with a brace in tonight's 3-2 win at Southampton to make it three goals in as many games, having only joined the Red Devils for £36m from AS Monaco on deadline day.

Neville says that he was unimpressed by the youngster's goalscoring record prior to joining United, but now admits that he has precious little choice but to re-evaluate his opinion.

"Could he step up from being a 15 [goals] in 70 [appearances] man to a one in two man? Can he get to that level? Difficult," he told Sky Sports News.

"I never thought he'd even be close to that but he's shown in the first couple of weeks he's got the composure to score goals.

"I wouldn't have imagined that he would have had the composure that he's had, because his goalscoring record before he came to Manchester United was 15 goals in 70 games, which doesn't suggest he's got that level of composure."

Martial also scored in last weekend's 3-1 win over Liverpool, before drawing a blank in the 2-1 Champions League defeat at PSV Eindhoven on Tuesday.