Celtic manager Neil Lennon insists Arsenal must get serious about Kieran Tierney's price if they want him.

The Hoops are thought to value the Scotland left-back at £25m, but Sky Sports News says the structure of the Gunners' latest offer has failed to tempt Celtic into cashing in.

Lennon said: "The club's valuation of Kieran has not been met and until then we don't have a discussion to make."

When asked whether he expected Arsenal to return with a third offer, Lennon said: "I don't know what Arsenal's financial state is. I know what ours is and we are quite comfortable with the situation at the moment.

"There has been a second bid, the bid has been rejected and it's as you were."