DUBAI, April 15 (Reuters) - Saudi Arabia’s Binladin Group expects to reach an agreement to restructure its debt by the fourth quarter of 2021, Al-Arabiya TV channel reported on Thursday citing CEO Khalid al-Gwaiz. Saudi banks own 70 percent to 80 percent of the construction group’s debt, he said. BinLadin’s debt could range between $20 and $30 billion, sources familiar with the matter told Reuters in 2019.