Sorry, nope, that's 1st year Horio... in ShinPOT style! I guess... I agree he looks different, but this is Shin POT which is taking place the same year as original POT, but... I think everybody has grown. Based on these scenes of 1st years? Dan refers to Horio as part of the cheering trio XD
That's Urayama. He was introduced in the very end of TeniPuri, during Ryouma's match with Yukimura. But I don't think he made it into the OVA. He's a 1st year from Rikkai. I thought we'd never see him again. He was introduced as a gag-name character, Urayama Shiita. I hate puns so I hated him at first but I'm glad he's a real character in the new series! (he's the guy in my icon, too. I colored him anime colors.)
The truth is, I have read/watched the end of TeniPuri yet! (*gasp*) I stopped at the start of the Finals match against Rikkai.. and then just jumped over to Shin TeniPuri. I don't really know why ~.~;;
So I really don't know how the series (& matches) ended. But I will get back to it one day!
Well, you can probably guess who won the match of Yukimura vs Echizen.... during their match, Urayama sorta talked back to Sanada regarding Ryouma's tennis excellence, and it was pretty cute & funny. But I really do hate bad puns.