Tony Montana on his X handle claims Arsenal are Chelsea puppet, lol. He also claims that the two clubs are not rivals but rather Chelsea owns Arsenal both in Europe and in the transfer market. Well as for the Europe and transfer market, I totally agree with him because in Europe Chelsea has shown that they are way bigger than Arsenal by landing European trophies like the Champions League which is the major trophy for all clubs in Europe and also in the transfer window, they've sold players to Arsenal that isn't worth the amount. Over the past few years, Chelsea has raked up almost £200 million from players sales to Arsenal alone.
Tony Montana said about the truth. Arsenal is the only club that often took Chelsea reject. Remember Willian? Luiz? Havertz? Sterling?. That's statement based on the reality, and not something that can be argued with.
Arsenal sees Chelsea as a merchant to shopping the new players. This sounds weird, but real!

I recall that there haven't been any significant transfers between the two teams in the last couple of seasons, but we've seen some very expensive players before. When a player alone is paid around 70-80 million, the financial issues between the two teams naturally pique our interest

That's the way football is; a player you buy for 20 million could reach a value of 50 million in a few years. And besides, he might not meet your needs, and you could make a good profit by selling him