[3] Khonco was scheduled to fight Siyabonga Siyo for the vacant IBO mini-flyweight title on June 11, 2016 at the Emperors Palace in Kempton Park, Gauteng.
The fight was a hometown bout for both competitors, as they both hailed from the Eastern Cape province of South African Republic.
[8] Khonco was scheduled to make his second IBO title defense against Lito Dante on June 10, 2017 at the Emperors Palace in Kempton Park, Gauteng.
[10] The fight ended abruptly in the fourth round, after an accidental clash of heads left Khonco unable to continue.
[14] Khonco faced Ariston Aton (9–3) on April 9, 2022, at the Superbowl in Sun City, on the undercard of the Athenkosi Dumezweni and Landi Ngxeke South African super flyweight title bout.