Panathinaikos striker Marcus Berg complained over the poor refereeing after the Greens sealed the victory against Xanthi.
Panathinaikos went past Xanthi by 1-0, however they are upset over the refereeing as Voskakis's controversial decisions left them frustrated.
Berg spoke against the referee officials straight after the game as the Swedish striker was furious from Voskakis's calls.
“I don't want to say anything on the game. It's always difficult to play against 12 men or even against 15 men,” he underlined.