The Real Madrid ace has been linked with the Red Devils endlessly and it appears the Welshman could leave the La Liga side for Old Trafford.
Spanish outlet Don Balon say the only way Florentino Perez will sell Bale is if they get David De Gea in return.
And with the forward willing to fight for his place at the Bernabeu, the 28-year-old will also have to be told by Real he is surplus to requirements.
The Spanish champions are aware Bale’s value has gone down because of his injury problems.
And they therefore see United’s interest as something they might need to take advantage of.
De Gea has been in stunning form for the Red Devils this season, keeping eight clean sheets in 11 appearances.
Manchester United have the goalkeeper to thank for earning a point at Anfield against Liverpool on Saturday after his spectacular save from Joel Matip.
Bale has not featured for Real since their 3-1 win over Borussia Dortmund in the Champions League back on September 26.
Real Madrid return to action tonight in Europe's elite competition when they host Premier League side Tottenham.
United travel to Benfica tomorrow evening in the Champions League looking to make it three wins on the spin in the competition.
