Spanish news outlet Don Balon claim the La Liga champions are ready to offload the Welshman.
It's suggested Monaco sensation Kylian Mbappe will arrive at the Benabeu imminently.
And Real chief Zinedne Zidane has been told to free up space in his squad for the prodigious 18-year-old.
It's suggested one of Karim Benzema, Cristiano Ronaldo or Bale will need to go - and it's the former Tottenham star who'll be sacrificed.
Bale was reportedly untouchable at the start of the summer.
But Don Balon say Mbappe's impending arrival has muddied the waters.
Real supremo Florentino Perez is now ready to listen to offers for the 28-year-old.
It's claimed Bale is open to a Premier League return - and Mourinho is ready to splash the cash.
United have already spent big this summer.
Romelu Lukaku was snapped up from Everton for around £75m.
Victor Lindelof has also been drafted in from Benfica for £31m.
Mourinho has been heavily linked with Inter Milan winger Ivan Perisic.
But with a deal year to materialise, Mourinho could focus his attention on Bale.
