ARSENAL are set to come back in with an improved offer for Celtic star Kieran Tierney.

Boli Bolingoli-Mbombo’s £3million Hoops move was confirmed tonight as interest in Tierney intensified - with Napoli at the front of the queue.

2 Arsenal want to snap up KT Credit: PA:Empics Sport

The Italian outfit are expected to lodge a big-money bid for the Scotland star as they attempt to gazump the Gunners.

But the London giants will return with a fresh offer after seeing an opening £15m swoop KO’d by the Scottish champions.

Celts are holding firm on their £25m valuation of KT - but they now have a ready-made replacement in Bolingoli-Mbombo.

The 24-year-old has signed a four-year deal.

2 Emery is set to return with an improved offer for the Hoops starlet Credit: Reuters

He said: "You can’t say no to a club like Celtic - it feels great to have signed.

"It feels amazing, actually, to be part of the Celtic family.

"I’m happy to be here at this club, and hopefully I can help win more titles and trophies.”

We told how former Scotland boss Alex McLeish said Napoli - managed by AC Milanlegend Carlo Ancelotti - would be a ‘great step’ for Tierney, 22.