And Paddy Power have now made him just 16/1 to be the league's top goalscorer this season.
Riyad Mahrez and Callum Wilson are currently joint top with five goals each, while Bafetimbi Gomis, Odion Ighalo, Graziano Pelle and Jamie Vardy have all scored four.
GETTY
Anthony Martial struck twice for United in the 2-3 win over Southampton
Martial's treble has him level with Andre Ayew, Russell Martin, Steven Naismith and Dimitri Payet.
Paddy Power said: “He might have come with a hefty price tag but Martial is already paying back the United board and he’s flying up the betting ladder of contenders for the Golden Boot.”
Martial is now also 13/2 to win the Young PFA award, 16/1 to score more United goals than Wayne Rooney in his career, and 7/1 to captain the side.
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