Fernandes had a chance to put his team ahead with a penalty kick, but he missed it by a wide margin, with the ball flying over the crossbar.
Manchester United has not won a game in the new Premier League season, despite having played only two matches, and is currently ranked 16th in the league.
In a post-game press conference, Fernandes revealed that referee Kavanagh's actions had "triggered" him before he took the penalty kick.
Fernandes explained that he follows a specific routine before taking a penalty, but referee Kavanagh did not apologize for disturbing him.
Fernandes acknowledged that he made a mistake by hitting the ball poorly and that the referee's actions were not an excuse for missing the penalty.