Here's five things we observed.
1. Hands on, just like Pep
Anyone who has ever seen Manchester City manager Pep Guardiola on Amazon will know that the Spaniard is nothing but intense.
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From shouting at his players, to grabbing them, to dragging them into positions, to jumping around the place, Guardiola is animated to say the least
Arteta spent three years learning his trade under the two-time Champions League winner at the Etihad, and it seems Guardiola's style may have rubbed off on him.
It's not clear what the Spaniard was instructing his Arsenal players, but he was certainly hands on with them as he dealt out instructions.
2. Ozil put through his paces
Arteta made a point of reiterating the importance of Mesut Ozil to Arsenal when speaking to the press for the first time on Friday.
"Of course he's a massive player," explained the Spaniard. "I work with him and I know when he clicks, what he can bring to the team. It's my job to get the best out of him, of course."
Ozil missed the Everton game through injury, although interim boss Freddie Ljungberg claimed he wouldn't have played him anyway after his conduct against Manchester City.
But Ozil could be back sooner than expected now that Arteta is at the wheel. And it's safe to say the German will be made to work hard.
3. Coaches are involved
Guardiola ensured Arteta was always involved in Manchester City's training sessions.
It's this experience, working so closely and in a hands-on manner with Guardiola, that earned Arteta a shot at the Arsenal job.
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The Spaniard clearly agrees with his mentor that this is a good approach to have, and made sure his coaches at Arsenal were front and centre on Sunday.
Among them, head of performance Shad Forsythe was photographed giving France international striker Alexandre Lacazette some instructions.
4. Some motivational words
Guardiola's Amazon documentary All Or Nothing showed the Spaniard is a fan of gathering the players in a big group and addressing them as one.
This isn't a new phenomenon in football management, but Arteta was snapped in more than one shot talking to players in a group, seemingly getting his philosophy across to them.
Arteta explained that he has a plan to turn things around in his Friday press conference.
He warned that any player unwilling to buy into his project to get the Gunners firing isn't fit to wear the famous red and white shirt.
5. Youngsters aren't going anywhere
One of the talking points from arguably the flattest game of the Premier League season to date on Saturday was Ljungberg's team selection.
Out were the likes of Lacazette and Matteo Guendouzi as Emile Smith-Rowe and co. came in - with the young Englishman making his first top-flight start.
Ljungberg insisted he selected the team, but there is the sense that Arteta had an influence on the line-up in a bid to get a better look at the entire Arsenal squad.
It should therefore come as no surprise that the Gunners youngsters were visible in a number of pictures from Sunday's training session at London Colney.
