UFC 218 results Francis Ngannou flattens Alistair Overeem with vicious KO

UFC 218 results Francis Ngannou flattens Alistair Overeem with vicious KO UFC 218 results: Francis Ngannou flattens Alistair Overeem with vicious KO Francis Ngannou's power is so sickening, the UFC has yet to produce an opponent capable of finding out whether he's a complete fighter. After watching veteran heavyweight Alistair Overeem violently succumb to being knocked out cold by one punch on Saturday at UFC 218, it's a question we aren't any closer to finding out.