Celtic have Mohamed Elyounoussi on a season-long loan from Premier League side Southampton .
It was rumoured Saints had paid Swiss side Basel £16m to sign him back in 2018.
According to Daily Star, that fee was closer to £12m with another £4m to follow in potential add-ons.
Boss Ralph Hasenhuttl green lit his loan move to Celtic and he looks unlikely to change his mind and give him another go.
It's understood Celtic would have to table a bid around the £9m mark to get Elyounoussi on a permanent deal.
That's the same price they paid to get Odsonne Edouard from Paris St-Germain two years ago.
Source-
Daily Star