That's because you're a retard and just because you think Prince of Tennis sucks every other sports manga/anime sucks.
Hajime no Ippo
Ashita no Joe
MOTHERFUCKING Captain Tsubasa
All those Mitsuru Adachi baseball/sports manga (Touch, H2, Cross Game, Rough)
Ring ni Kakero by Masami Kurumada if you like your boxing with super moves
Aoki Densetsu Shoot!
And that's only a small sample. Goddamn, why are newfags such retards?