This is Manchester city home Chelsea is coming to play and there is no how the match is going to be tough with Manchester city, because Chelsea will not going to achieve victory from them because their head coach will allow their potential players to work in a way they will perform well through out. I know that Manchester city is still experiencing some challenges in the areas of defense and midfield which their head coach is not fix yet, but they will not allow Chelsea to take advantage of that to draw the match 1-1 which I know that Manchester city players will not allow such mistakes to happen. The two team will definitely have a goal in this match, because Chelsea are very good this days which I know they will score goal but Manchester city will defeat them 2-1 at the end of the match.
Manchester City is strong but I think you are not giving Chelsea enough credit. Manchester City has good team but they have some weaknesses in defense and midfield that Chelsea could take advantage from. Chelsea has been playing well recently and they will probably give Manchester City hard time. I agree that both teams will score goals but it is hard to say who will win. Chelsea might be able to use Manchester City weaknesses to get tie or even win game. Match is going to be exciting and very competitive.
Manchester City are in a slump, they are weakening after finishing last season well but this season they are really under heavy pressure, especially after the defeat in Paris I think it will be difficult for Pep's team to recover quickly, many factors have caused Man City to slump even more, especially the performance of the players on the field has started to decline and the mentality has faded a little and I think Man City will need time to recover, Chelsea who are currently arguably quite good in terms of player performance are more impressive than Man City and I think Chelsea have a higher percentage than Man City in the EPL match.
Playing at Man City's home is not easy for Chelsea from the last 5 matches at Man City's home Chelsea have never won, but I see the performance this season or currently Chelsea is superior and their away games in the EPL this season are quite good and I think Chelsea will come out as winners.