Since rejoining Manchester United from the Italian club, the Portuguese player has scored 12 goals in 17 appearances.
1,097 games, 814 goals.
The first player in history to score 800 top-level career goals was the Manchester United player, who struck twice in the win over the Gunners.
It was a typical response to the recent suggestions that his style of play might not suit the pressing approach of the new interim manager, who was at Old United for the first time since his appointment to watch the Portuguese reach the landmark.
The German was impressed by the 36-year-old.
He scored five goals for Sporting Lisbon, 450 for Real Madrid, 101 for Juventus and 115 for Portugal, all in his two spells with United.
He is the all-time top scorer in Real Madrid's history.
Alan Shearer, the all-time top scorer in the premier league, said on Amazon Prime Video that you just have to applaud the guy.
It is his determination. It is very difficult to get to the top. The world is looking for you to perform every week if you don't get up in the morning. He has done a great job.
Bruno Fernandes is a team-mate ofRonaldo's. He is improving game by game. He wanted to be the best and that's what he did. He knows how to motivate himself.
Is he the best scorer ever?
There is no central database to record the all-time top scorer in football.
The Czech football association says that Bican scored over 800 goals in official matches. He has a tally of 805, which includes reserve-team and non- official international goals.
The numbers of goals scored by Brazil legends Pele and Romario are different, but they both claim to have scored more than 1,000.
The players nearest to Ronaldo at the elite end of football are the likes of Pele, Romario, and Ferenc Puskas.
Lionel Messi has 757 goals for Argentina, Barcelona and Paris St-Germain.
The Spanish teams that have had more than 20 goals scored by the Portuguese player are Sevilla, Atletico Madrid, Getafe, and Barcelona.
He has hit double figures against 19 teams. He has scored eight against them.
His goals on Thursday were a huge boost for the club, which fell behind in controversial circumstances when Emile Smith Rowe scored while David de Gea was on the ground injured.
But Fernandes tied the game beforeRonaldo scored. The veteran netted a penalty to win the game.
Before this summer, Fernandes was United's penalty taker, but he was happy to give up the duties.
"We didn't talk," he said. I trust him the same way I trust myself because I missed the last one. I missed the last one so it was time for the other one to be taken.
What now for the man?
Manchester United's interim manager until the end of the season is Rangnick.
He is known for a high-pressing style of football, while the other is less pressing than any attacker in the league.
Before the game, Carrick said that it was "probably a myth" that the player doesn't press.
Rob Green, a former England goalkeeper, said that Raknick doesn't have to playRonaldo. He can do what he wants.
Can he press? He turned around and said "look at that run I made in the last couple of minutes to get into the penalty area, I can do this." I can run.
They will sit down with the manager and the player and say "we're going to do it this way." Are you on board?
I'm sure he will say yes.
