The West London club broke the news:
While no official comment has been forthcoming from the French Ligue 1 leaders, both Lucas Moura and Yohan Cabaye have made their intentions clear toward their former team-mates.
Per Matt Law of the Daily Telegraph, Moura, who played together with Oscar whilst at Sao Paolo, said:
Oscar is a very good player. A rare talent in today's football, given his qualities. He is very complete and is very smart. We need someone like him at PSG.
I think he would help us a lot. The more quality players there are, the better it is for the squad. Also, he's a very good friend of mine. I would be very happy if he came to PSG, the club too.
Cabaye was equally effusive in his praise of ex-Lille team mate Hazard:
Hazard is the player I'd like to see at PSG.
He would do a lot of good to Paris and the league. He's one of the best players against whom I've played.
While it is unlikely that Mourinho will take kindly to such blatant seduction of his best players, especially ahead of such an important week for the Blues, the mere fact that a price has now been placed on the heads of both players allows PSG to know where they stand.
And there is not too much doubt that moneybags PSG can afford the incredible fee proposed.
Along with Manchester City, PSG are bankrolled by Qatari money, and club president Nasser Ghanim Al-Khelaifi is more than happy to lavish those funds on transfer purchases.
Per an interview with L'Equipe via Simon Rice of The Independent, he said:
"If we didn't have any [FFP] limit, we'd bring in Messi. If Messi isn't coming to Paris, it's because some limits really exist."
In that context, Mourinho's comments are slightly worrying. A resolute "not for sale" would've set the Portuguese's stall out, but instead he has chosen an ill-advised game of brinkmanship.
However, as Al-Khelaifi pointed out, Financial Fair Play rules would likely prevent such a bid, and Mourinho likely knows he's not at risk.
That sort of attacking prowess is priceless to a football club. Or worth £300 million if you listen to Mourinho.