After the widespread scoffing at the huge fee Manchester United paid for the 19-year-old and all the talk of pressure on his young shoulders, he's been superb.
Not only have his three goals in two Premier League games been brilliantly taken, the stats around them highlight just what a great start he's made at Old Trafford.
His three goals make him the club's top scorer. They also mean he's scored just one less goal in the Premier League than the entire Manchester United squad at Louis van Gaal's disposal. Between them they've scored four, with Adnan Januzaj who is out on loan, getting one other.
In two games Martial has scored more than many of the most recognised strikers in the Premier League. Among them are Christian Benteke, Olivier Giroud, Sergio Aguero, Diego Costa and Harry Kane.
Southampton 2 Manchester United 3 player ratings
Southampton 2 Manchester United 3 player ratings
1/21 Southampton: Stekelenburg: 5/10
The Dutchman was not helped by his defenders, but did not have the look of a composed man. Not a worthy replacement for Fraser Forster.
2/21 Yoshida 4
Right back is not his favoured position and it showed. Produced a criminal back pass to gift Martial the opportunity to score his second goal.
3/21 Fonte 6
A leading light in Southampton's back line. The only remaining member of last season's tight knit rearguard, he is a level above the rest.
4/21 Van Dijk 5
The defender is quickly discovering that the Premier League is not comparable to the north of the border. Struggled and lucky not to be dismissed for a petulant foul on Martial.
5/21 Targett 5
Substituted at half time after struggling to contain United's forages forward on the right flank.
6/21 Wanyama 6
The enforcer was not at his best but still helped to smother plenty of United attacks. However, couldn't link to the front men as well as he would have liked.
7/21 Romeu 5
Struggled to get a foothold in the game. The Spaniard must improve if he is to fulfil his potential at St. Mary's.
8/21 Mane 6
A constant menace. Few defenders seem to have figured out how to stop him and he produced a superb assist for Pelle's second.
9/21 Ward-Prowse 6
The English youngsters boasts superb delivery from wide areas and did not disappoint. Needs to do more to cope with the physicality of the division.
10/21 Tadic 6
Encouraging early on, but the midfielder's display fizzled out somewhat. His crosses did not dip in quality but he did not have the impact that his start suggested he would.
11/21 Pelle 7
A simple tap in for the first goal, which he took well, and nodded home superbly for his second. Would have had a hat trick but for the width of the post.
12/21 Manchester United: De Gea 7/10
The safest pair of hands in the division. Exposed by his poor defence on countless occasions but still made several smart stops.
13/21 Darmian 5
Withdrawn at half time due to injury. If the Italian's absence is an extended one he will be sorely missed given the impressive start to his career in England.
14/21 Smalling 5
All at sea early on in a throw back to the dark days. Struggled to cope with Pelle's power and the fluid nature of the remainder of Southampton's attack. A dip after what has been a stellar start to the campaign.
15/21 Blind 5
Although the Dutchman is composed on the ball his lack of pace is strikingly obvious. His ability can get him our of trouble at times but his snail-like speed can be his downfall at centre back.
16/21 Carrick 5
The Englishman's strengths do not seem to sit well with Schneiderlin's. Sat deep but looked off the pace. He is far from an enforcer and his composed - but safe - patterns of passing did little to affect the game.
17/21 Schneiderlin 6
Appeared to be somewhat affected by the return to familiar surroundings. Received a bit of jib from the home crowd but still managed to pass the ball impeccably.
18/21 Mata 6
Debate continues in regards to the Spaniard's best position, though the right flank is not alien to him.
19/21 Rooney 6
Distinctly average. The skipper was deployed at number 10 and covered plenty of ground but did not provide the cutting edge in the final third that he is constantly expected to command.
20/21 Depay 6
It just isn't happening for the Dutchman. He is desperate to make something happen but his powerful runs and ability on the ball are yet to yield a final product. Struck the post in the build up to Mata's goal.
21/21 Martial 8
The teenager has answered his critics emphatically. A well-taken brace courtesy of two composed finishes had the appearance of a man with far more experience than the 19-year-old. His instant impact goes from strength to strength.
The current top scorers in the division are Riyad Mahrez of Leicester City and Callum Wilson of Bournemouth, who both have five goals. But despite those two players being the stand-out players of the season so far, neither can match Martial's ratio of goals to minutes. The young Frenchman has scored once every 39 minutes he's been on a pitch. In comparison, that stat is 94 minutes for Mahrez and 105 minutes for Wilson.
Despite his fantastic start at United, Gary Neville is yet to be convinced: "Could he step up from being a 15 [goals] in 70 [appearances] man (his record at Monaco) to a one in two man? Can he get to that level? Difficult," said the former United captain.
But he added: "He's made a big impression on all of us."
Next up for Martial in the Premier League is a game against bottom of the table Sunderland at Old Trafford.
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