RIYADH: Saudi Arabia formally established diplomatic ties with Kosovo following the signing of the protocol accord for diplomatic relations by Khalid A. Al-Nafisee, permanent representative of Saudi Arabia to the United Nations, and Avni Spahiu, Kosovo ambassador to the United States, at the UN office on Friday. A close ally, the Kingdom has also been one of the top donors to Kosovo, which broke away from Serbia and declared its independence in February 2008.