Celtic and Scotland full-back Kieran Tierney is being targeted by Arsenal and Napoli

Napoli are considering a move for Celtic defender Kieran Tierney, with Arsenal yet to make an acceptable bid for the 22-year-old

Arsenal are set to return with an improved £19m offer for Celtic star Kieran Tierney.

Arsenal will need to spend half of their summer transfer budget to bring in Celtic's Scotland defender Kieran Tierney, 22, with the left-back valued at £25m by the Scottish champions.

Arsenal have stepped up their interest in Celtic's Kieran Tierney and have identified him as the Gunners' top target at left-back.