Borussia Dortmund manager Peter Bosz says anything can happen from now until the end of the summer transfer window.
Arsenal and Barcelona have both been linked with one of Bosz' players: Ousmane Dembele.
But the 53-year-old will not lose any sleep amid all the speculation surrounding his players.
"If I were to dwell on everything that might happen then I'd sleep badly at night," he said.
"You just don't know about the knock-on effect and that's not an issue right now.
"A lot can happen all of the time.
“Neymar's in the news now, but it will all continue until the end of August. Mbappe will most likely switch clubs and also cost a lot of money."