In a meeting with Pavlopoulos, Tsipras was expected to have presented his plans for negotiating a new bailout deal with the country's creditors.
Pavlopoulos says he accepted Tsipras' demand, saying that the referendum was not about staying in or leaving the euro.
Meanwhile, Police say about 100-150 anarchist protesters have started throwing firebombs at riot police and setting trash cans on fire in the central Athens neighbourhood of Exarcheia. This is far from the place where celebrations are taking place by supporters of the "no" vote in Sunday's referendum.
