Mitrovic's opener, where he caught Arsenal defender Gabriel dawdling in possession, saw him reach 100 goals for Fulham as he hit his fourth of the season.
The goal eclipsed his return from the whole of the Fulham's relegation campaign two years ago, and goes some way to disprove the theory that he's a Championship striker who can't handle the step up to the top flight.
The Serbia striker was a handful for Arsenal defenders Gabriel and William Saliba throughout the game on Saturday and doesn't care about what the critics think of him.
"I don't really care to be honest," he told the club's official website.
"I know I had the confidence, the manager had the confidence, my team-mates had confidence in me, and what other people say I'm not really bothered.
"People have different opinions but I focus on myself, focus on keep working hard for the team, and when the team plays well I know we will create chances and I will score goals.
"It sounds nice, and I'm really happy to score 100 goals for this beautiful club, and hopefully there will be many more to come."