Sieghart is pretty strong but that’s not going to phase Ryoma. Ryoma has tennis skills at the ready and he can serve up those balls really quickly. I’d like to see Sieghart try to counter his attacks because I just don’t see it working. Ryoma’s skills are almost literally out of this world. He has no weaknesses in his Pinnacle of Perfection mode which is bad news for Sieghart and any hope he had of claiming victory. Ryoma wins.
Update 8 7 2020 Sieghart’s strength would ultimately be enough to stop Ryoma. Sieghart wins.