The 18-year-old Brazilian has hit the ground running for the Gunners
But since signing for the Gunners on July 2 this year, the Brazilian forward has already made a real name for himself.
With seven goals in his first seven appearances for the club – three of which have come from the bench, meaning he’s only had four starts – it’s been a blistering start to life in north London.
The 18-year-old has scored in every single game he’s started, notching a goal every 58 minutes on average – an incredible return.
As it stands, Martinelli is Arsenal’s second top goalscorer this season, only behind Pierre-Emerick Aubameyang who has eight.
Record breakerEmbed from Getty Images
It’s not only great performances that Martinelli has been producing – he’s been smashing records left, right and centre along the way too.
He’s already being mentioned in the same breath as the likes of Ian Wright and the Brazilian Ronaldo.
The last thing we want to do is put too much pressure on the young lad.
But let’s just take a moment to appreciate what he’s done and already achieved in the short space of time he’s been here.
Youngest Arsenal player to score two or more goals in European matchEmbed from Getty Images
When Martinelli scored two goals in three minutes to put Arsenal into a comfortable lead at home to Standard Liege on October 3, he put his name into the history books.
That brace made him the youngest player ever to score two or more goals for Arsenal in a major European fixture, aged 18 years and 107 days.
Previously, the record was held by Theo Walcott, who scored twice against Slavia Prague in the 7-0 hammering at the Emirates Stadium in October 2007. He was 18 years and 221 days old at the time.
Now bumped down to third on the list from second is Cesc Fabregas who also scored in the same game as Walcott when he was 20 years and 172 days old.
Other notable names of youngest Arsenal players to score a European double are Carlos Vela, Jack Wilshere, Robin van Persie, Nicklas Bendtner and Frank Stapleton, who were all aged between 21 and 22 when they did it.
Most goals by a Brazilian in first 400 minutes of action in Europe
Martinelli is not only keeping some pretty impressive company when it comes to Brazilian footballers in their first games playing in Europe – he’s the best.
Of the Brazilians who have arrived in the continent, only Ronaldo has scored as many goals as Martinelli in their first 400 minutes of action.
Manchester City striker Gabriel Jesus netted four times in his first 400 minutes, Rivaldo and Alexandre Pato scored three and Ronaldinho two.
Neymar, Robinho and Adriano each scored one in the same amount of time.
First Arsenal player to score in first 4 starts since Ian WrightEmbed from Getty Images
No Arsenal player has scored in their first four games for the club since Ian Wright did it 28 years ago in 1991.
Some incredible players and goalscorers have been and gone from the club in that time – Thierry Henry, Dennis Bergkamp and Robin van Persie to name but a few.
But none of them hit the ground running quite like Martinelli has this year.
Of course it’s important not to get too excited early on in any player’s career, but the youngster is certainly doing something right.
‘I want to show my potential’Embed from Getty Images
“I’m proud that Arsenal has put its trust in me, so I will always give my all to help this team reach the top. That’s where it belongs,” Martinelli told Arsenal.com.
“For now, though, I’m just focused on making more Premier League appearances.
“As it’s my first season, I want to show my potential to steady myself at the first team. I know the squad is packed with great players, but I know what I can do and my goal is to help the team.
“And finally, I want to thank all the fans for their support. They have been so welcoming to me ever since I arrived.
“What they can expect from me now? Someone who always gives his best, his maximum, and who always plays with his heart.
“That’s the most important thing you need to know about me.”