I think Tottenham vs Man City match would be the decisive match for Arsenal a draw by those two teams would give Arsenal a chance of winning the league I believe it's going to be tough match because Tottenham is equally aiming to secure a top 4 UCL spot a position currently occupied by Aston Villa, however as the league is coming to an end matches are becoming more tougher thus Arsenal would face fierce challenge from their three remaining matches against Bournemouth, Man Utd and Everton thus it's up to the team to win to win those matches to keep their chances of winning the league alive and it's obvious the team has a good and massive goal differences if eventually they have same points with Man City at the last day.
I think if Manchester City gets a draw against Tottenham it won't determine Arsenal fate of becoming champions because their points will be the same and maybe only goal productivity will determine who will emerge as champions. I am still optimistic that Manchester City will succeed in winning this season because Manchester City focus is only on the Premier League after they were eliminated from the Champions League. Also on the Arsenal side they can also lose points because they still have 3 difficult matches.
Between Arteta and Pep Guardiola, I think these two coaches will determine the best strategy for the remaining matches this season. Maybe if Manchester City becomes champion again then Arsenal will be disappointed for the second time. However, if Manchester City and Arsenal lose points, it will certainly open up opportunities for Liverpool again.
Arsenal fans have basically become accustomed to disappointment instead of feeling happy at the end of the season. Arsenal are not a team that can always be expected to win the title, but they have been title contenders in the last two seasons with Arteta. I think Arsenal will also fail to win the title this season when they have to decide their fate while expecting Manchester City to drop points in the next 4 matches, that is a difficult scenario when Arsenal also has to win the next 3 matches.
Manchester City will be increasingly motivated to win every match in the future, which means Arsenal has the potential to fail to win a higher title than Manchester City. Arsenal can certainly still hope because every end-of-season game can be guaranteed to be difficult, but they will also find it difficult to maintain consistent performance instead of just hoping Manchester City makes fatal mistakes.