Well the definition of a "Filler" is an episode of the anime that does not follow the manga. We all know its used so the anime does not catch up to the running manga or used to make the anime purposely different from the manga.
I suppose they were talking about as you said, something to "Fill up" space between the interesting parts.
“Sso you got a 37 hit combo in Marvel vs. Capcom? TRY A 5,375 HIT COMBO, BITCH.”
- ScrewAttack's Review of Star Solider (N64)
Well I was reading XxXholic and some chapters are just fillers, you can take them out and it wouldn't matter. I myself was surprised at seeing this because I thought that -fillers- only existed in Anime.
I suppose that a fill up before the Finals is required, a bit of them how they are preparing, maybe some of them training(Kaidoh, Eiji and Oishi) the players of Rikkai and lastly a nice double page of the players facing each other (showing the line-up of the matches), end of chapter.
Tamiel - (^^)
Yay!!! It's Rikkai VS Seigaku AGAIN!!!!!!!
Too bad I totally wanted to see Sanada pawn that guy!!!
Just showing the scores of Rikkai is not enough!! MOU!!
by kamesoul @ LJ
Boo! You don't even see Rikkaidai! Just the scores! What gives? I wanted to see Sanada play.
Still, the fact that Sanada won 6-0 is good enough for me. Everything is falling into place hehe
Well..... Still no PoP, so the bet continues..