Pajtim Kasami has left Fulham to join Olympiakos for an undisclosed fee.
The 22-year-old Swiss midfielder, signed from Italian club Palermo in 2011, struggled to establish himself as a first-team regular at Craven Cottage.
After ending the 2012-13 campaign on loan at Lucerne, he returned to Fulham and scored the winner in their opening-day victory at Sunderland.
He also netted a brilliant goal in a 4-1 win at Crystal Palace, but the season ended in relegation.
Kasami made a total of 55 appearances for the west London club, scoring three goals.