Cadena Ser have claimed that Aston Villa have already bid for the 21-year-old - who scored 15 times in the Segunda Division last season - but the report has suggested that Newcastle are "best positioned" in the race for his signature.
Real Betis and Celta Vigo are also interested, according to the Spanish outlet.
The Spanish ace has a £2.3 million buyout clause which Newcastle boss Rafael Benitez is willing to meet as the former Liverpool coach looks to bolster his forward line.
Whether it's Ayoze Perez or Aleksandar Mitrovic, Benitez has a couple of talented strikers in his ranks, but it remains to be seen which of them, if any, keeps faith with the Magpies following their demotion to the second tier.
Aston Villa are not blessed with a prolific goalscorer but newly-appointed manager Roberto Di Matteo will definitely need one if he wants to win promotion next term.
Aston Villa finished bottom of the Premier League with a meagre 17 points last term - a season which saw Tim Sherwood and his replacement Remi Garde both sacked as manager.
Benitez, meanwhile, replaced Steve McClaren in March but, despite his experience, he was unable to inspire United to survival.