Olympiakos Piraeus successfully defended their lead in the Greek Super League with a 4-1 win over Panionios.
Belluschi put the home side ahead on 32 minutes and Diogo doubled the advantage in the 52nd.
And the Athens outfit continued to trouble their opponents with Mitroglou adding goals in the 78th and 80th minutes. Goundoulakis got a consolation goal for Panionios with three minutes to go.
Olympiakos maintain a gap of four points with second-placed PAOK Saloniki, who in turn have a four-points advantage over AO Xanthi.