Bale, 26, suffered a calf problem last month and is unlikely to be fit for the derby with Atletico Madrid on Saturday after suffering another setback in his recovery sessions.
A report in Spain has suggested that members of the Madrid hierarchy are now exploring the prospect of offloading the former Tottenham star at the end of the season, given his track record of fitness problems at the Santiago Bernabeu.
Bale, who joined Real from Spurs for a world record £85.3m fee in 2013, had already suffered two separate muscle injuries prior to his current knock this season.
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But his agent, Jonathan Barnett, has hit back at claims Real are looking to cash in on his client, telling the Daily Mirror: "It's a completely rubbish story made by an irresponsible and totally ill-informed journalist."
Bale has scored 13 goals in his 15 appearances in La Liga this season, while also registering eight assists.