Former Greek Prime Minister Alexis Tsipras says the upcoming national election is a battle between his "honorable" government of the past seven months and "the dark period of corruption, cronyism and power networks" that prevailed in previous decades.

Tsipras, leader of the left-wing Syriza party, says he is the best-placed to improve the bailout deal with Greece creditors which he himself agreed to in July and which he described as "open-ended" on several issues and subject to improvement through negotiations.

Speaking at the Thessaloniki International Fair, Tsipras outlined a government program whose reformist agenda has been, with a few variations, echoed by previous governments.

He said Sunday that his economic policy would be based on "strong government intervention ... to redistribute incomes."

The election will be held on Sept. 20.