The winger has become a first-team regular this season, having been used sparingly by Erik ten Hag during his first season at the club.
Garnacho has been a rare bright light in an otherwise difficult season for the Red Devils.
The Argentine had a hand in Scott McTominay’s opener, forced the ball to Antony for his equaliser at the end of normal time and played in Amad Diallo for the winner in the 121st minute.
That’s despite Garnacho training just twice in the week, and carrying a hamstring problem.
Garnacho’s brother revealed the details after praising his sibling for his performance on X.
United will take on Coventry in the FA Cup semi-finals at Wembley after their dramatic win against Wolves.
The winners will take on either Chelsea or Manchester City in the May showpiece.
United are next in action on March 30th, when they take on Brentford in north-west London in the Premier League.
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