"A coward will always find an excuse for his retreat - a Georgian proverb," Nurmagomedov wrote on social media.
"This is why I lost respect for Umar and Ali a long time ago - they play dirty games and write all sorts of stupid de***o insulting my country and my people. Be as energetic when you meet me in person - you will see what will happen," the Georgian fighter replied. "What kind of person are you? Letting your manager write your nonsense for you."
"Don't drag your country or nation into a personal conflict with me. When you meet me in person, don't turn away," Umar parried.