The whole losing sequence just made me want to cry. IT WAS SO SAD, AND SO TRUE. And I don't even play sports. The only competitive thing I did was marching band, which isn't quite as direct-battle-versus-worthy-opponent and more try your best and get judged. But still. I felt so bad for those two and all of the other "losers" they showed. crying
They seem to be singling out the four characters from each school (our main four from the previous season, then Rin and Nitori, recurring, with the addition of a new antagonistic-sort and yet another orange-haired guy to hit on Gou), so I figure Nitori has a good shot at sticking around for the rest and/or having a (heartbreaking) storyline. It looks as if the four-person relay is going to be a HUGE theme, so it makes sense to have two sets of four and do lots of comparing/contrasting.
And I'd totally forgotten about Riko, but you're right, they did exactly the same thing. xD That made me giggle.
...I just attempted to imagine the Doctor having a "training montage" in the form of sports anime. The incarnation of the Doctor that music came from looks like this and is very much adorkable, so that makes it extra hilarious.