The Australian and the UAE-born Chechen will fight on June 22 in the main event of the UFC's debut event in Saudi Arabia.
"The outcome of the fight will depend on Whittaker's performance. If Robert fights like he did against Paulo Costa, he will emerge victorious. I think Whittaker has a good wrestling defense. He also has better standup defense than Hamzat. Robert will beat Chimaev and finish him in the late rounds," Erceg told MMA News.