By Will Butcher

Arsenal are ready to do battle with Manchester City for Celtic teenager Kieran Tierney, according to a report.

Tierney has been a mainstay in the Celtic starting 11 following Brendan Rodgers’ move to Glasgow earlier this summer, already making 16 appearances in all competitions.

The Sun claim that the left-back has caught the eye of both of the Premier League side’s scouting teams with his impressive performances in the Champions League this term.

The one-time Scotland international starred in last month’s enthralling 3-3 draw against Pep Guardiola’s City, supplying the cross for French wonderkid Moussa Dembele to acrobatically finish into the corner of the net.

Celtic’s number 63 has impressed defensively for Celtic, giving his side a sturdy and reliable look on the left side the Hoops’ back four as well as providing an attacking outlet when the Hoops are in possession.

Now, Arsenal could be set to make 19-year-old Tierney their new long-term left-back, as they look for reinforcements in what is becoming a problem position for Arsene Wenger and his staff.

Nacho Monreal is the first-choice left-back but is 31 in January and Kieran Gibbs has less than two years remaining on his contract and was made available for transfer this summer.

The Express claim that the Premier League duo will face stiff competition from Bundesliga champions Bayern Munich, who have also been alerted by Tierney’s impressive displays.

Celtic could charge a heavy transfer fee for their talented teenager, with almost five years still remaining on his current Celtic Park deal.

Tierney is currently with the Scotland squad to face Lithuania and Slovakia, as Gordon Strachan’s men eye a place at the 2018 World Cup in Russia.

In other Celtic transfer news, Colin Kazim-Richards has revealed why he left Celtic to move to Brazil.