If it isn't simply rumour mill bollocks, then I guess we wait to see Romero's reaction, etc. I don't think it's a move you can block too easily if the player gets his heart set on it, and fortunately we know Levy would extract an eye watering amount if we got into negotiations.
Hopefully he wants to stay. He's really grown into that leadership role and he might well be a first choice for captain after Son (maybe Maddison instead, but who knows). If we sold for a shite ton of money then I actually have faith in our recruitment to spend the money well.
It'd probably a win-win.