Real Madrid are assessing whether to make a surprise summer move for Kristoffer Ajer following his impressive showings in the Scottish Premiership this term.
The Celtic star has been an integral part of a defence which has just helped the club win its ninth top flight crown in succession.
But his impressive form is now attracting attention from outside of Scotland, with Madrid among the teams monitoring his situation according to Mundo Deportivo.
The Spanish giants though face a tough battle for the 22-year-old's signature with Paris Saint-Germain, Manchester City and Leicester City also showing interest.
Madrid are looking for a long term replacement for Sergio Ramos whose contract expires next summer as the 34-year-old approaches the end of his career.
Dayot Upamecano of RB Leipzig remains a priority target but Ajer could provide a more tempting prospect at a significantly smaller transfer fee.
Ajer still has another two years to run on his current deal at Parkhead and Scottish side will be under limited pressure to sell the defender.
Standing at nearly two metres tall he possesses an aerial threat but is also comfortable with the ball between his feet.
The Norway international has been a big success at Celtic having arrived from Norwegian side Start for around just £500,000 in 2016.