The 28-year old is believed to have grown disillusioned with the game and is seeking other options. 

He has twice won the A-League Championship and Premiers Plate double with the Sky Blues and will leave the club with immediate effect.

“It has been a privilege and an honour to represent this great club for as long as I have and winning trophies for my home town has been an incredible experience,” Ryall said.

“I love this club and have made some fantastic friends but for now I feel I need a break from football to pursue some other interests and regain my desire for playing the game.

“It is a big decision, everyone at the club has been unbelievably supportive, and I’m hugely thankful for everything they have done for me during the last nine years.

“Our members have also given me incredible backing throughout my time here and Sydney FC is the only Australian club I would ever wish to play for.

“I wish every Sky Blue more continued success in the future.”

Head coach Graham Arnold recognised the enormous contribution Ryall has made to Sydney FC.

“Seb has been an excellent servant to Sydney FC. To play close to 200 games for one club is a fantastic achievement," he said. 

“We didn’t want him to leave but we understand his desire to take a break, to do some other things in life and rekindle his passion for the game.

“He and I had a great conversation before he left and he is fully supportive of everyone at the club and everything that we are doing here.

“We wish him well in the next stage of his life.”

Ryall is one of the longest serving Sydney FC players having played 190 games for the club across all competitions and has scored 10 goals since he joined from Melbourne Victory in 2009.