Bale hasn't featured since suffering the latest in a series of calf injuries that have plagued his time in Madrid, against Barcelona on April 23.
However, he claimed he has paid the price from rushing back from ankle ligament damage suffered in November and that his right ankle still hasn't fully recovered.
"I am not 100 percent, I haven't played for six or seven weeks," Bale said on Tuesday.
"I obviously had my operation which still really hasn't recovered.
"I have been playing with a lot of pain, even when I came back I was taking tablets to get through games and training.
