Spanish winger Albert Riera has signed a four-year contract with Turkish club Galatasaray, completing a move from Olympiacos.
FIFA.com looks at how the arrival of coach Ernesto Valverde and four influential foreign players is helping to push Piraeus giants Olympiacos back to the summit of Greek football,
Kevin Mirallas scored twice as Olympiacos thumped Panionios 5-0 to take a four-point lead at the top of the league, but chasers Asteras suffered a 2-0 home defeat to ten-man Panseriakos.
Olympiacos remain at the top of the Super League after Albert Riera, Vassilis Torosidis and Ioannis Fetfatzidis gave them a 3-0 win over FC Xanthi, while Panathinaikos kept the pace with a 1-0 win over PAOK.
Former Liverpool and newly signed Olympiacos winger Albert Riera has written a personal letter thanking the club and fans and urging them to forget the past.
Albert Riera has completed his move to Olympiacos, the Greek club have announced.