Arsenal new boy Kieran Tierney has admitted he is "heartbroken" at receiving stick from some sections of the Celtic support after he made the record-breaking move to London.

The defender, 22, signed a long-term deal with the Gunners earlier this afternoon on a deal worth a reported £75,000 a week.

Die-hard Celtic fan Tierney has now taken to social media to pour his heart out to the club and its fans.

READ MORE: Celtic 'did all they could' to keep Kieran Tierney but player wanted Arsenal move, club claim

And while he understands some supporters' disappointment in his decision to depart, he has been left with a tinge of sadness at how they have reacted.

Taking to Instagram, KT wrote: "This is coming from the bottom of my heart! I don’t know how to even begin to put the last 15 years of my life into words... what you as fans have given me and my family I cannot repay you in any way possible and for that I am sorry. 

"From the age of 7 I was lucky enough to play for the club I love and will continue to love till the day I die no matter what happens. 

"Every single second of my Celtic career was a dream and I gave my all every single time I stepped onto that pitch, it’s honestly the least I could do for everyone involved at the club. 

READ MORE: John Hartson hails 'brilliant' Arsenal-bound Tierney and tips him for top

"Every single coach and staff member who has helped me on my way to getting where I am today I am so grateful for all the hours help you put into me making me a better player and a better person. 

"My team mates have been the best I could possibly have asked for what a bunch of legends man who I’ll be supporting until the end. 

"Where can I start with the fans? I tried my best to represent you every time I went onto that pitch. The relationship we had together and the memories we created and history we made was incredible.. 

"I will cherish every single second of it. I hope we can continue to have a relationship although I understand that will be never for some people which is heartbreaking for me but I understand the emotions surrounding this situation."

Tierney went on to explain how leaving Parkhead for Arsenal was the "hardest day of his life" - and thanked the Hoops for their impact on his career and his life.

READ MORE: Celtic fringe abusing Kieran Tierney are ludicrous, Arsenal move was no-brainer

He added: "It has been the hardest day or two of my life and I really appreciate every single message of support from you all. 

"This was not easy in any way shape or form. To end id like to mention the special relationship I had with the ultras who I have grown up with from BHOYS and Green Brigade.. the atmosphere yous create to help the team is massive and it helped me so much over the last few years.. 

"I thank u so much for these times together what we have achieved as a club the last few years isn’t possible without you and all the fans. 

"This is not nearly enough of what I am feeling but I literally cannot put into words with the emotion I’m feeling towards you all but I hope I showed you every game that I was lucky enough to play. God bless🙏🏻💚 @celticfc".