This is their work, what does they get tired? Those who do not want to continue to play in the Arsenal can always go to another club, this is a normal phenomenon, transfer windows for this exist. Arsenal played poorly with Tottenham, I doubt that with such a game they have a chance to become champions, and City looks very good and I do not see who can stop them from becoming champions again, at first I thought that it could be tried to do Liverpool, but after games with Nottingham became clear that this would not happen.
Without Rice and Odegard arsenal can never outplay spurs at white hart lane, it will never happen, the only way arsenal can get 3 point out of there is by playing defensively and making use of the counter attacks and set piece and that exactly what they did yesterday.
And saying players don't get tired of project like this without winning anything because they are professional is where you are getting it wrong, we've seen projects like this with Kloop in Dortmond, Tottenham of pochettino, and so on and either the coach get tirrd or the players get tired.