Kieran Tierney: Arsenal 'optimistic' over Celtic defender deal

Arsenal are expected to return with an improved offer for Kieran Tierney

Arsenal are in talks with Celtic to sign Scotland defender Kieran Tierney.

The Premier League club had a £15m bid rejected by the Scottish champions but are expected to return with an improved offer for the 22-year-old.

There is optimism that an agreement will be reached between the two clubs, and personal terms are not expected to be a stumbling block.

Tierney has only played sporadically this year because of a hernia problem and is recuperating from surgery.

• 'Are Arsenal big enough for Tierney?' - former Celtic keeper Bonner