Sydney FC coach Vitezslav Lavicka is confident young defender Seb Ryall can step up to the plate.

The 20-year old, who has finished a four-match ban, is now available for A-League selection and Lavicka has confidence that he can contribute for the team.

However, he is uncertain if it will be this week in the top of the table clash against Gold Coast United.

''He is a good player, a young player, and now he is available again I am sure he can contribute,'' Lavicka said.

''His fitness is very well, he worked hard in every session and he is ready and hungry to play. But the one problem is his game fitness and this is what we have to decide for this weekend.''

League leaders Sydney take on second-placed Gold Coast at Skilled Park on Saturday evening.