“Tottenham have signed a few — and they’re not far behind us.
“We have now missed two windows — and the fact we missed the last one made this a bit more crucial.”
Speaking on Wednesday, Ajax boss Erik Ten Hag said he was happy to keep the attacker until the end of the season.
He said: “Ziyech to Chelsea? A transfer was coming, we expected it to happen.
“And I actually already expected this one or two years earlier. And each time it was: ‘Wow, he stayed again’.