The 19-year-old also operated in defensive midfield last season, helping his side win promotion to the Serbian Super Liga.

"It's absolutely unbelievable to join such a big club," Pivas told Newcastle's official website, external.

"I see the young players have developed very well here and I would like to do the same - to develop and get into Newcastle's first team. I'm very excited and I can't wait to begin."

Magpies chief executive Darren Eales described Pivas as "a promising talent with high potential".

"We look forward to supporting his development at this important stage of his career," he added.