Sydney FC has welcomed back Stephan Keller for the Hyundai A-League match against Gold Coast United at Skilled Park this Saturday night (9pm AEDT).

Keller has missed four matches due to a knee injury but completed training today to take his place in the squad. The central defender will add much needed experience and poise on the park this weekend.

Coach Vitezslav Lavicka's top-of-the table team will be out to continue the impressive form that saw the Sky Blues account for Wellington 3-1 last round. The club has enjoyed an important week off the field with foundation player Terry McFlynn signing a new three year deal.

Lavicka is happy to have Keller back in the squad.

"It is a boost for us with Stephan back," Lavicka said. "Before he received the injury to his knee he was an important player for us. He is a tall and strong defender to add to our squad. He is a good player to have for the set pieces (because) he is tall. We will take him in the squad of 16 and decide who will play on the match day."