So far Gabriel Jesus has been a very important player in the Arsenal team and Arsenal's excellent game so far, of course, has a very large share of Gabriel Jesus and with the absence of Gabriel Jesus of course it will greatly affect Arsenal's performance.
however it all comes back to Arsenal coach Mikel Arteta how to handle this.
and so far due to the world cup we can see players who have improved performance and also injured players, it will all have an impact when they return to their respective clubs, be it positive or negative changes.
Jesus and Zinchenko was are City main team players who have become very important players in the Arteta team. For Guardeola, their absence is noticeable this season, did he really think that if so many important players left the team (remember Sterling went to Chelsea) his team's game would not change? But the season is not over yet, perhaps in the end it will turn out that he was right. )
The loss of these players was not even felt in Guardiola's team, the additional players closed them up
Imagine a club loosing Gabriel Jesus, Zinchenko and Sterling and are still doing fine at the top.
Gabriel Jesus and Zinchenko are both great part of Arsenal team, Gabriel Jesus may not score but he opens space up for other players to score. Zinchenko has dumped Tierney since his arrival on the bench, he had been outstanding.