It wasn't an easy win for Arsenal despite being in control especially in the second half. But getting three points was the important point of course. Trossard hasn't been scoring a goal in Premier League games for a very long time. But today he scored the winning goal and finally finished this bad streak for himself.
Things are going well for Arsenal in the league. But they might need to improve their performance a little more in the long term. This is important for especially big games. Their next game is against Tottenham in Emirates so I really wonder how this game will end.
The performance of Tottenham is far from what we saw from then in the past, especially in the last season.
We know Tottenham didn't have a good performance and that's why they fired their coach in the last season, also Tottenham didn't have a good atmosphere in the team and when Kane left then I thought they would show poor performance.
But a miracle happened and in the game, they had against Sheffield United, Tottenham scored two goals in the waisted time to win the game.

Tottenham's performance was very good at the start of this season. Different from what many people thought, Tottenham without Kane would be bad. Well, I personally also thought like you at first. And they even appeared a little doubtful in their first match at the start of the season when they were held to a draw by Brentford. But on Matchday 2, Tottenham proved that they were not weak and had even gotten stronger. The captain, H. Son, seems like he is indeed suitable to be a captain. Because he always makes a big contribution to every match that Tottenham plays. J. Maddison is also one of the mainstays of Tottenham's attack line. What makes Tottenham's attack line still strong even without Kane.
Seeing how Tottenham's performance is very good this season, Mikel Arteta must prepare his troops better next week. Because Arsenal cannot afford to lose in front of their own supporters. I personally can't predict how this match will go. Because both clubs haven't even lost once. But last season Tottenham even lost 2 meetings against Arsenal, both home and away matches. However, this time there was something different about Tottenham's performance. So the match history may not be used as analysis material for this match.