Celtic have held talks to re-sign their former defender Kieran Tierney on a pre-contract deal from Arsenal.
The 27-year-old left Celtic in 2019 for a reported £25m fee but Arsenal are ready to let him leave at the end of his contract, with his career in English football having been blighted by injuries.
Amid interest from Celtic and a host of other clubs in Europe, it remains unclear whether Arsenal will let Tierney leave on loan in January before making any move permanent in the summer.
But there is a lot of goodwill towards Tierney in north London, with the Scotland international considered a model professional.