Hainer was unambiguous in his public statement.
"Michael Olise is a Bayern player, he has a long-term contract. We are not a selling club. If Florentino Pérez wants to send us an offer — which hasn't happened so far — he can save himself the trouble. Not even for €150m or more."
The statement reignites debate about the actual identity of Pérez's intended €150m target, given that Hainer's declaration effectively closes the Bayern Munich door.
Olise had been widely identified as the target based on Pérez's published clues — a midfielder or forward, Champions League player, not from the Premier League — though the Real Madrid president publicly denied the French winger was the intended recipient.
With Bayern now formally on record as refusing to sell, attention returns to the PSG pair of João Neves and Vitinha as the most credible remaining candidates. Desire Doué of PSG is a third possibility.
Olise, 24, produced one of the most remarkable individual campaigns in European football this season — 22 goals and 31 assists across all competitions — and departs for the World Cup with France as one of their central attacking weapons. He is contracted at Bayern until 2029.