Arsenal performance aren't bad, but Arsenal are high likely will not win against Manchester City because if you check on their head to head, Manchester City always win regardless the league and where the match were played. So I assuming Manchester City already get extra 3 point, Arsenal must win in their next matches otherwise Manchester City will overtake them.
It's really sweet achievement if Manchester will win FA Cup, Premier League and Champions League in this season.
Arsenal still managed with 6 points left current standing indeed losing points against Manchester City still have chance on the top position behind three points left if consistent for other games. I sure this season Primer League tittle will win by Arsenal because they left one competition only than Manchester City still participants in Champion League and FA Cup.
I don't think have chance for Manchester City winning Primer League this season because left many points from Arsenal on current standings, but crucial games when both face each other and Arsenal need draw only have been enough secure first standing position from Manchester City and large chance with Primer League tittle this season.