RTL, is that still free television though? Used to get them free on satellite back in the early 90s. Was only really good for the occasional football match and of course the soft porn in the evenings (pre-internet).
Joshua/Wlad did over 10 mill viewers on RTL so yes I assume they both did pull similar numbers during their careers. But it's OK considering Joshua is not marketed there like the Klitschko's.
Watched it was a good fight but boxing is on the decline in germany and in german TV. Must causal fans need german or german based fighters like Maske, Ottke, the Klitschkos or Abraham to root for. It's a shame that they didn't gave Golovkin a chance on TV