Honestly the absence of Gabriel Jesus when the league resume will have a negative impact on Arsenal, he has been a workaholic and hardworking striker who always assisted the team defensively as well as a good ball dribbler and with 5 goals and 6 assist to his credit this season is a good statistic, unfortunately his injury is a big blow to Arsenal title bid sidelining with three months injury will affect the team because I don't think Nketiah is capable enough to fill his role as a complete striker, alternatively Arteta might play Martinelli as the main striker while Nketiah comes as a substitute, Arsenal fans will feel bad with this latest news.
Arsenal's striker stock this season seems sufficient even though one of them has suffered an injury. I agree that Jesus' injury will have an impact on Arsenal's attacking power, but considering there are other players who can make up for this deficiency, it doesn't seem to matter.
So far Arsenal and the consistency is still very convincing, but I don't know how things can turn out for them in the second half of the season. I only believe that other strong teams like Manchester City, Liverpool, Tottenham or Manchester United will continue to try their best to collect more points, and of course this will affect Arsenal's progress at the top.