The Brazil international helped the Reds secure a smooth passage into the fifth round of the Emirates FA Cup, where Erik ten Hag's men will face an away tie at either Bristol City or Nottingham Forest.
After registering an assist for Bruno Fernandes's opener, Antony regained the lead for United in the second half with a calm finish, after Luke Shaw's effort bounced back off a post.
It was his first goal since the Premier League win at Forest back in April of last year and he is convinced there is much more end product, something the manager said on Sunday he demands from his wingers, to come before the season is out.