Former Switzerland international Stephan Keller has signed a deal with Sydney FC that will keep the defender at the club until the end of the forthcoming A-League season.

The 30-year-old had spent the last two years at Holland side De Graafshap but is relishing a new challenge with the Sky Blues. Keller also had offers to remain in Europe from clubs in Turkey and Greece - but once he learned of Sydney's interest, there was only place he wanted to go.

"When I came over here for a trial I was pretty sure my family would live here much better than in a place in Greece or in Turkey," he told his new club's official website. Sydney kick off their A-League campaign against North Queensland Fury next Saturday.