Celtic are ready to ramp up their interest in Hajduk Split midfielder Niko Sigur as the club looks to strengthen their options in the middle of the park. CEO Michael Nicholson is now expected to advance the Hoops’ pursuit and open talks with Hajduk Split in the coming days. He starred alongside Johnston at the World Cup, starting in their Round of 16 clash with Morocco. He has also covered at right-back, giving Celtic another option in an area where Johnston has carried much of the responsibility. With Hajduk demanding a significant fee and other clubs watching Sigur, Celtic will have to decide quickly just how serious they are about landing one of their midfield targets.