By George Georgiopoulos and Renee Maltezou ATHENS (Reuters) - Greece's radical left Syriza party can win re-election with an outright majority, a senior member said on Tuesday, and govern without relying on other parties that backed its hard-fought bailout deal with international creditors. Panos Skourletis, energy minister in the Syriza-led government which resigned last week, also said the nation must avoid deadlock leading to a second round of elections - a scenario that politicians are already debating even though a first round has yet to be called. Prime Minister Alexis Tsipras, who during his seven months in office took Greece to the brink of financial collapse and exit from the euro, resigned last week in the hope of crushing a far-left rebellion in Syriza and strengthening his grip on power through a snap election.