Former interim leader Vangelis Meimarakis, the leadership candidate that is tipped to be in the lead, is watching the results of the voting of the New Democracy leader as they pour in from his office at Daphne, a district in south Athens.
Supporters and colleagues have gathered to watch the results and there is optimism concerning his chances.
The other three candidates are Kyriakos Mitsotakis, Apostolos Tzitzikostas and Adonis Georgiadis.