Newcastle United are closely monitoring the rise of Celtic center-back Kristoffer Ajer after scouts from the Magpies traveled to Ibrox on Sunday to watch the Norwegian.
Newcastle boss Steve Bruce is aiming to bolster his defensive options with the addition of the 23-year-old defender, who is under contract with the Scottish side until 2022.
The center-back is believed to be destined to leave Celtic Park.
According to The Sun, Norwich City is also linked with the Norway international, valued at £ 8million.
Ajer joined Celtic in 2016 and has since made 174 appearances for the club.