For weeks, the public line from Atletico had been strong: Alvarez was staying. Senior figures had pushed back hard on the idea of a sale, even after reports of a major bid from Barcelona earlier in the summer.
Now, though, the mood appears more complicated.
That is a very different picture from the one being painted earlier in the month.
If Arsenal are truly in the discussion, the attraction is obvious. Alvarez brings mobility, aggression and flexibility across the front line. He looks like the sort of forward who can sharpen an already high-level attack rather than simply add another body.
A swap involving Gyokeres, if it is seriously explored, would also speak to contrasting ideas.
Other reports suggest Arsenal have already been busy elsewhere in the market, so any attacking move of this size would be part of a bigger end-of-window push.
The biggest snag is simple: Alvarez reportedly still prefers Barcelona and is not thought to favour a return to England. That means even if clubs can find common ground, the player’s wishes may decide everything.
For now, the next clue may come when Atletico face Villarreal on Sunday. Whether Alvarez returns to the squad or remains on the edge of events, this looks like a transfer story with another turn still to come.