Nah, Hirakoba got cocky and wanted to end the match by using his a special shot that he perfect himself without Kite.
And it was fitting opponents since it was against Fuji.
But he didn't think Fuji would evolve in the match. Unfortunately for Hirakoba, he is in the manga and not reading it lol. This means he and the rest of the other characters have no idea that Seigaku characters are wrapped in Plot Armour.
Even if Fuji used TnK, Black Aura, and 10 ball at the same time Hirakoba would've won that match 10 out of 10 times if he had a brain.
It's not like people don't know Fuji had a reputation of being crazily good. It was triple match point (40-0) and Kawamura cannot return even regular Habu. Fuji, on the other hand, can clearly return regular Habu (not necessarily well, but he can definitely return it). Given POT still has to observe tennis rules, Fuji cannot return for Kawamura no matter what so the game was going to be over in 2 points anyway.
If the score was 40-30 and Hirakoba decided that a drawn out fight is risky (he was clearly getting tired) so he had to risk it all that'd have at least made sense.