Manchester United left-back Tyrell Malacia features on a list of Celtic loan options if they fail to land Kieran Tierney before the transfer deadline.
The Parkhead club have agreed the terms of a pre-contract deal which will see the Scotland international return to Glasgow from Arsenal in the summer.
However, with Alex Valle recalled by Barcelona and sent out to Italians Como on loan, Brendan Rodgers hopes to wrap up a Tierney loan deal before the window shuts on Monday night.
Should Arsenal sell Oleksandr Zinchenko to Atletico Madrid, however, Gunners boss Mikel Arteta could retain Tierney’s services until the summer.