By Sean Walsh Manchester City forward Jack Grealish believes the additions of Declan Rice and Kai Havertz have helped Arsenal this season, while they also boast a new experience that was missing in last season’s title race. The Gunners travel to the Etihad Stadium on Sunday in control of their destiny, sitting top of the Premier League table heading into the weekend. A win will move them four points clear of City, while they it would also build a three-point gap to Liverpool if they lose to Brighton earlier in the day. Ahead of this huge meeting, Grealish spoke to City’s club channels about hi…