Ronaldo's campaign began with his desire to leave United this summer, an aspiration never fulfilled in the transfer window.
With his chances of leaving everyone with the said window closing last week, the 37-year-old now has to get on with life at Old Trafford.
He is getting used to being used as a replacement for Eric ten Haig's team, with Dutchmen preferring to use Marcus Rashford and Anthony Martial.
That's what happened on Sunday, with Rashford starting as number nine against Arsenal and scoring twice in a 3-1 win, ending the Gunners' 100% start to the season.
If Ronaldo had started, perhaps Ronaldo wouldn't have been trying to make a move while kicking in with Fred and Casemiro, but it wasn't a great look for the five-time Ballon d'Or winner.
The 37-year-old, took to the pitch around the hour mark on Sunday, as debutant Antony made way for his partner but not before securing his first goal for the club.
It was one of the better performances of late for the former Real Madrid star, as he proved he had the skills to fit into Ten Haig's system.
Their ability to suppress the way the Dutchmen want has been brought about, as Ralph Rangnick took over on an interim basis last December.
Antony scored just days after signing for United and an Arsenal fan will really have to see what he says in the future, after finding out he has the power to dodge his team.
Lee Gunner was doing a live video of his reaction to the game and talking about the former Ajax man's influence on the match.
However, they chose the worst time to start making that point, as Brazil took just seconds later thanks to an amazing flowing move and an advantage given by the referee.