Indeed, Haro revealed the talks for Lo Celso led right up to deadline day.
He Radio Cope: "Lo Celso was our No1 option. We started chatting with him in June, but PSG only wanted a sale.
"So we could not reactivate this option before the end of the transfer window.
"We have a mandatory purchase option for Lo Celso if we qualify for the European Cup. If not, it will be optional."
Lo Celso is on a season-long loan at Betis.