The Internet King Is No. 1 in the World

This is a fantasy world of tennis. The protagonist relies on his talent to do whatever he thinks of and becomes the best in the world of tennis. Seiichi Yukimura, Kunimitsu Tezuka, Genichiro Maami, Keigo Atobe... All the protagonists and supporting characters were defeated miserably at the hands of the protagonist. In the end, even Echizen Nanjiro was no exception. The protagonist is indeed cheating. If not cheating, would he be the perverted opponent? You can't travel through time and still be Sasabe. I forgot to mention the name of the protagonist, I need to think about it... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.