Arsenal signing Fabio Vieira has bid an emotional farewell to Porto.

The Portuguese midfielder, 22, ended his 15 year association with Porto on Tuesday, signing a long-term contract with Arsenal.

"My time at this enormous club has come to an end. Fifteen years exactly of being a Dragao," the player explained on Instagram.

"I came here as a boy to the club that I love, which instilled in me so many essential values to make me the man and player I am today.

"I managed to achieve something I always dreamed of, being national champion with Porto. I am eternally grateful to Porto and the entire Porto nation which has always welcomed me with open arms for this whole journey.

"A special thank you to everyone who accompanied me and worked alongside me these past years, they had a huge part in my growth.

"I made great memories and great friendships here which I will cherish forever.

"Thank you to the entire Porto nation, Dragao forever!"