Marinakis helped Olympiacos to win the Super League several times but I think he gave up Champions League from the beginning. If you want to reach a certain stage (QF, SF) you should sign better players than Ba, El Arabi, Guilherme, Gaspar and the likes. I guess he thinks CL is a hopeless case for a Greek team cannot compete with Barcelona, Real Madrid and Paris Saint-Germain. He doesnt want to give out big money; it is enough for him that Olympiacos could dominate at home.