The Spaniard worked wonders at St James' Park last season on a small budget but must spend to add much needed quality to his Magpies side.
Newcastle have been linked with a host of players this summer including Russia World Cup star Aleksandr Golovin.
The player's agent Alexander Manyakov has told Sport.ru that Newcastle – as well as Southampton – are interested in signing the CSKA Moscow midfielder.
But there could be potential new hope for Newcastle after Golovin's dad told Premium Sport his son is having English lessons.
"Aleksandr doesn’t want to read any news as he’s focused on Russia and the World Cup,” his dad was quoted as saying by Premium Sport.
“I’m sure my son will be able to play at a new level.
"It’ll be difficult even with a new language, but he’s already started to learn English.”
Golovin, 21, has been on the books with CSKA since signing form Metallurg Novokuznetsk in 2012, and he has now made more than 100 appearances for the club.
The playmaker hit the headlines with a stunning free kick goal against Arsenal last season and another during a fine display in Russia's 5-0 World Cup win over Saudi Arabia.