I don't view this as a very good fight for Kongo, his chin seems pretty shot and his defense is bad, I can just see the overhand right crashing onto his jaw.
Cheick gets vaunted as a great striker but his hands were never his strong point, back in his kickboxing days it was his kicks that made him successful. Roy isn't the greatest technical striker but he's more then capable of landing as like I said Kongo's defense is lacking and his hands are average.
The one area where Kongo can win is in the clinch however, Roy is known to be weak there and opponents have commented that he is physically weak, Kongo needs to bully him in the clinch, he can tire him out and beat him up there, and we will see Roy's knockout power fade in the later parts of the fight as we've seen in the past