Chelsea and Manchester United have strengthened this season and Manchester City has just signed Grealish I would say that Chelsea and Manchester United closed the gap with those signings.
Yes, it seems that only City, Chelsea, United have been discussed a lot and have made transfers of star players with good performances last season. I don't hear Liverpool, arsenal and totenham buying star players. So maybe the EPL this season will be in the domination of United, Chelsea and City. But it looks like they got off to a bad start last season, and it was too late to play their best game. Oh, maybe on Thursday we can see Chelsea against Villareal in Super cup.