Martial started his career in France with St Etienne's rivals Lyon.
And he is now hoping to continue his good form on Thursday against the Ligue 1 club.
Manchester United star Anthony Martial is relishing the clash with St Etienne
"There was a huge rivalry while I was still at Lyon – it was always a highly-charged atmosphere and they were usually massive games, the kind all players love to play in," Martial told Manchester United's official website.
"So there will be that added competitive edge whenever I play against them.
"We know it will be a difficult match but if we play with all our quality, I think we can do good things.
Manchester United 2-0 Watford: 10 key statistics from the match
Sun, February 12, 2017
Express Sport brings you 10 key statistics from Manchester United's 2-0 win over Watford at Old Trafford
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Express Sport brings you 10 key statistics from Man United's win over Watford
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Manchester United star Anthony Martial scored his side's second against Watford
"Of course, it would be great if I could score against them again, but I hope we can win the game because that’s the most important thing, then it would be a bonus if I managed to grab a goal.
"They have a tremendous following and I’m sure it will be lively, even more so as they’re not used to playing against big clubs like United.
"There’s always a great atmosphere there even against the smaller teams, so I can’t imagine what it will be like against us. It will be up to us to put it out of our minds."