Incoming UN Secretary-General Antonio Guterres will take the oath of office tomorrow.<br/><br/>During a formal ceremony at the General Assembly, Mr. Guterres will be sworn in before outlining in an address to all 193 UN member-states his plans to confront global crisis and reform the 71-year-old United Nations. He will take over from Ban Ki-moon on first of January. <br/><br/>The designate ninth secretary-general and former prime minister of Portugal has put ending the five-year carnage in Syria at the top of his to-do list and is keen to put forward a new plan to achieve a settlement.