With Sevilla's two experienced stoppers unavailable for Wednesday's Champions League meeting with Chelsea, Pastor was thrust into the limelight for his debut.
While the Blues recorded a dominant 4-0 victory, the 20-year-old produced a solid performance on his first outing in the senior ranks.
However, Pastor's contract is due to expire at the end of the season, and his surprise appearance has inevitably led to interest in his signature.
According to AS, Liverpool and Real may make an approach for the youngster during the January transfer window.
Although both clubs are well stocked for options between the sticks, the former Spain Under-17 international is regarded as one for the future.
Real would allegedly look to use Pastor in their Castilla side. body check tags ::