Celtic have turned down Arsenal's initial offer of £15m for their 22-year-old left back Kieran Tierney, as they are seeking £25m for the defender.
The Gunners are on the look out for defenders after conceding 51 league goals last season, with Tierney viewed as the ideal replacement for 33-year-old Nacho Monreal, who is out of contract this summer.
Despite reportedly only having a spending budget in the region of £45m, Arsenal are likely to return with a better offer in the coming days.
The Sun have claimed that full-back Carl Jenkinson was offered as part of the deal, with youngsters Jordi Osei-Tutu, Emile Smith Rowe and Eddie Nketiah also presented as options for Celtic to consider to push the move through.