![Khabib Nurmagomedov, right, defeated Conor McGregor by submission in their October 2018 UFC bout in Las Vegas. Reuters](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/KRKE6DMX775XAPYOUYTOUK6LUI.jpg?smart=true&auth=26af68513675b204d0b70a62d1231a066e483d7673343fa5de658c8d9289f26d&width=400&height=225)
Khabib Nurmagomedov, right, defeated Conor McGregor by submission in their October 2018 UFC bout in Las Vegas. Reuters
Khabib Nurmagomedov, right, defeated Conor McGregor by submission in their October 2018 UFC bout in Las Vegas. ReutersKhabib Nurmagomedov and Conor McGregor trade insults on social media to further fuel rematch rumours
Rivals took to Twitter as feud rumbles on nearly 18 months after their showdown at UFC 229