@yummyjks
There are no pages or panels of Sukune fighting anyone in the previous series.
Those are drawings of a hypothetical rikishi who Itagaki uses to make a point. The street fight shown is explicitly referred to as a hypothetical situation.
He is a distant descendant; he was born 2,000 years after the original Sukune. He is not a clone. This is mentioned at the end of the previous Baki Dou. We'll get there. Don't worry.