El Confidencial says Bale is in a fight not to exhaust the diplomacy of Zinedine Zidane and the patience of president Florentino Perez due to his lengthy injury list.
Zidane knows that he is a player with whom he can not count for a third of the season, at best.
There are also concerns from the Spanish side that his love of golf — which he often plays when he has time off — contributes to Bale's back problems, it is reported.
Manchester United remain keen on Bale, while a return to former club Tottenham has also been mooted.
It is understood that Real Madrid would consider parting ways with Bale, who has won three Champions Leagues in four seasons with the club, if they can recoup the £86m they paid Spurs to sign him over four years ago.