Winner: Reiss Nelson
What a day for the 22-year-old.
There were a lot of worried faces around the Emirates when Bukayo Saka limped up in the first half, but Reiss Nelson soon calmed any fears about a nervy second half.
The winger scored twice in three minutes soon after the interval, his first league goals for Arsenal since he scored the winner against Liverpool 837 days ago.
It was a big moment for Nelson and it was clear by his reaction how much the goals meant to him.
And with Saka potentially set for a spell on the sidelines, he has surely now put himself right at the top of the pecking order to replace the 21-year-old on the right-hand side of the attack.
Winner: Gabriel Martinelli
If ever someone needed a goal, it was Gabriel Martinelli.
The Brazilian endured a torrid evening during the defeat at PSV Eindhoven on Thursday night, producing by far his worst performance of the season.
But he bounced back in impressive fashion against Forest, scoring the early goal that got Arsenal off to the perfect start.
Martinelli started the move with his sweeping ball out wide to Bukayo Saka and then finished it with an excellent header on the run.
It was just what was needed after his horror show in Eindhoven.
Winner: Mikel Arteta
This was the type of performance Arteta would have been dreaming of ahead of kick-off.
After drawing at Southampton and losing at PSV, all eyes were on Arsenal going into the game - especially with Manchester City knocking them off top spot in the Premier League 24 hours earlier.
It felt like a really big game for Arsenal given the past couple of performances and Arteta would have been slightly nervy going into it.
So he would have been delighted by the response from his players, who were under a bit of pressure for the first time this season.
It was the perfect way to go into next weekend's game at Chelsea.