Olympiakos have confirmed the signing of Portsmouth striker Lomana LuaLua.The Congo forward has joined the Greek club on a three-year contract. LuaLua had been linked with a move to Greece or Turkey in recent weeks having impressed during pre-season despite a disappointing campaign last term. A statement on the club's website, olympiacos.org, said: 'Olympiakos CFP announces the signing of Tresor Lomana LuaLua. The Congolese international player signed a three-year contract.' The Greek side have already strengthened this summer with the arrival of Real Madrid defender Raul Bravo and striker Darko Kovacevic from Real Sociedad.